Ronaldo is convinced he should have a penalty as he cuts inside and gets brought down by Mbemba but the referee is having none of it as he insists play goes on.
90' +3
Uribe lifts the resulting free-kick over the visitors' defence towards Pepe and Szczesny rushes out to collect but manages to spill the ball. Luckily for the away side, Szczesny's mistake goes unpunished as Demiral clears long.
90' +2
Alex Sandro gets yellow.
Taremi looks to have beaten the Juventus defence and Alex Sandro brings him down outside the area. A smart tactical foul which unsurprisingly means the Brazilian left-back gets booked.
90' +1
M. Loum enters the game and replaces J. Corona.
Francisco Conceição enters the game and replaces Sérgio Oliveira.
Loum also comes on and replaces Corona on the right-hand side.
The manager's son, Francisco Conceicao, who made his debut at the weekend, comes on to replace the excellent Oliveira.
89'
The hosts are camped out on the edge of their own area but they will not mind as they continue to defend resolutely to protect their one-goal advantage. Manafa then produces an important piece of defending to dispossess Ronaldo on the left-hand side before the Portuguese forward can capitalise.
87'
M. Demiral gets yellow.
Demiral goes into the book for catching Diaz with a stray arm when attempting to win an aerial duel inside his own half.
86'
Corona sneaks in behind Demiral but the substitute centre-back does well to reach in and turn it behind for a corner. Oliveira delivers the set-piece, however, Bentancur heads clear at the near post.
85'
Ronaldo beats Manafa with ease, delivering a wonderful cross which bounces at the back post but no one is there to test Marchesin. The Portuguese forward is visibly frustrated and seems to be having words with Morata.
82'
F. Chiesa has scored a goal for Juventus! Assist by A. Rabiot.
GOALLLL!!! 2-1!!! Rabiot goes roaming down the left-hand side, reaching the byline and crossing towards the penalty spot. The ball evades every player but Chiesa is alert to the opportunity, prodding a right-footed effort into the bottom left corner from the right-hand side of the area. It looked like Chiesa's effort caught Marchesin by surprise, as the goalkeeper perhaps expected the shot to come in at this near post.
Rabiot does all the hard work, racing down the left-hand channel before finding Chiesa to pull a goal back for the hosts.
Minute
Description
81'
Danilo gets yellow.
Danilo catches Sanusi with a high foot on the left-hand touchline and the referee has no option but to book the Brazilian. This also means Danilo will be suspended for the return leg in Turin.
80'
Oliveira arrows in a deep free-kick at a decent pace and Rabiot meets the delivery, heading over his own crossbar and out for a corner to the hosts.
79'
Morata has Marchesin looking slightly worried after volleying from near the centre circle. The ball seems to hang in the air for an age but the hosts' goalkeeper seems content to watch it float over the bar and out for a goal-kick.
78'
Marchesin is called into action once more, beating away Morata's shot with his right hand after the Spaniard had made the run in behind. However, none of that will matter as the assistant on the far side has their flag up for offside.
77'
A. Ramsey enters the game and replaces D. Kulusevski.
Welshman Ramsey replaces Kulusevski as Pirlo remains in search of a vital away goal.
76'
Marchesin covers a lot of ground to move towards the far post and collect Chiesa's corner, high above Demiral's head. For his defensive efforts, it appears Marchesin has taken a slight knock but appears fine to carry on.
73'
Corona coasts down the right-hand channel, reaching the byline before Bentancur gets across to turn behind for a corner to the hosts. Oliveira whips in the resulting set-piece but doesn't beat the first man.
69'
Danilo, perhaps more out of frustration than expectation, shoots from range and his effort travels high and wide of Marchesin's goal.
66'
M. Grujić enters the game and replaces M. Marega.
Marega, who added the second goal just after the half-time interval, comes off for Grujic as Conceicao signals his defensive intentions.
63'
Álvaro Morata enters the game and replaces W. McKennie.
M. de Ligt gets yellow.
The referee must have a long memory as, after nearly four minutes of play, he remembers to go back and book De Ligt for catching Marega late near the halfway line.
McKennie gets brought off by Pirlo as the Juventus head coach attempts to give his side some extra attacking impetus. Morata, as expected, is the man to come on up top.
62'
Chiesa nearly finds Ronaldo at the back post but his cross is a fraction in front of the Portuguese forward and races out of play on the left-hand side.
60'
Despite Porto's dominance and the visitors looking seemingly out of attacking ideas, one goal would make a huge difference to this tie, given the away goals ruling which could come into play in the next game between these two sides. As of yet, however, Pirlo's men don't look like threatening Marchesin's goal at all.
59'
The referee plays a good advantage as Marega gets clattered by De Ligt inside the centre circle. The hosts play on, working towards the left-hand side before opting to sensibly play backwards and retain possession.
57'
L. Díaz enters the game and replaces Otávio.
Otavio makes way for Diaz as Conceicao makes his first change of this Champions League tie.
56'
Marchesin comes racing out of his area to intervene before Kulusevski can latch onto Alex Sandro's quick, long throw-in down the left-hand side. On the touchline, it appears Conceicao is preparing to make his first substitute of the game.
55'
Danilo drills in a cross to the front post, Kulusevski lets it run and Pepe is forced to turn it behind for a corner as Juventus start to ramp up the pressure here. Chiesa's corner then looks set for the head of Ronaldo, however, Marega towers above his opposite man to head clear.
50'
There is nearly a mix-up between Uribe and Marchesin with the hosts' midfielder sliding in to block Kulusevski's cross. Uribe reads it well but, with Marchesin out of his goal, he nearly ends up scoring an own goal at the near post. Nevertheless, the deflection races behind for a corner to the away side.
49'
Corona goes surging inside from the right-hand channel but McKennie is there to produce a great last-ditch tackle and stop the Mexican's progression. Surely it will now only be a matter of time before Pirlo introduces the likes of Morata or Bernardeschi.
46'
M. Marega has scored a goal for Porto! Assist by Wilson Manafá.
Both sets of players have returned to the pitch and the referee gets the second half of this Champions League tie underway!
Manafa goes roaming down the right-hand side, drilling a cross to the feet of Marega, who scores past Szczesny to double the hosts' lead.
GOALLLLL!!!! 2-0 PORTO!!! It’s happened again as Porto score instantly after kick-off. This time it is Marega, who latches onto Manafa’s pass before taking a touch and slotting a left-footed finish past Szczesny at the near post. A great first touch by the Porto forward allowed him to get between De Ligt and Demiral before slamming home from inside the area.
45' +1
HALF-TIME: PORTO 1-0 JUVENTUS
45'
Bentancur arrows in another corner and, with Alex Sandro and De Ligt closing in, Porto do well to clear. When the away side recycle possession, Ronaldo then heads well wide of goal from a tight angle.
44'
A poor header inside by Danilo offers the chance for Oliveira to attack but the move breaks down as Corona receives the offload and takes too long in possession. Pirlo's men then break down the other end, with Ronaldo winning a corner on the left-hand side.
43'
Danilo sends an ambitious pass over the top for the run of McKennie, however, Marchesin comes quickly off his line to command his area and collect the loose ball. McKennie has been the visitors' most willing runner so far but has little to show for his efforts as of yet.
40'
Bentancur's set-piece swings towards the head of Ronaldo, whose effort rolls into Marchesin's hands at the far post. The Portuguese forward didn't have many options there, given he was under pressure by Pepe inside the area.
39'
De Ligt's pain is audible as he lets out a scream of pain after Otavio catches the centre-back's right leg near the right-hand touchline. As the fireworks go off outside the stadium, the visitors have a free-kick in a decent position.
38'
Alex Sandro gets isolated one-on-one with Manafa and attacks the right-back's channel. Despite Manafa's best protestations, the referee signals it will be a Juventus corner, which Marchesin then easily punches away down the left.
37'
Predictably, the away side attempt another diagonal pass to Alex Sandro and, for the first time, the pass finds the Brazilian left-back. Otavio quickly comes across to deal with the danger before Bentancur picks up a loose ball and crosses towards the front post, where Marchesin collects.
35'
M. Demiral enters the game and replaces G. Chiellini.
Chiellini slowly walks off, indicating that he is struggling with a calf injury and Demiral is the man to slot in at centre-back. This means the visitors now have a 21-year-old and a 22-year-old at the heart of their defence.
33'
Pepe is the man Oliveira is aiming for with his second corner of the game but instead he finds the head of Bentancur, who clears down the left. Rabiot then goes wandering forward, failing to find Ronaldo and gifting possession back to the hosts.
31'
For the third or fourth time in the opening 30 minutes, De Ligt tries a diagonal pass to Alex Sandro but overhits it out of play, much to the frustration of his Brazilian team-mate on the left-hand touchline. Pirlo's men are still struggling to get going and it is only a matter of time before Porto make them pay.
30'
Corona moves into the opposite channel, cutting inside and crossing to the head of Taremi, whose effort is then comfortably saved by Szczesny.
29'
Another chance for Sanusi to lead a counter-attack comes down the left-hand channel, however, he fails to find the feet of Taremi in the middle, which allows Chiellini to intervene and clear long.
28'
Sanusi picks up possession in his own defensive third, coasting past three or four tackles before being brought down by Danilo. Every single player on the pitch expects the referee to blow for a free-kick but he doesn't, offering the visitors a throw-in instead. Unsurprisingly, Sanusi has a few choice words with the referee and play then continues.
26'
Pirlo's best attacking outlet seems to be Alex Sandro so far. On this occasion, the left-back drives down the wing, attempting to find the feet of Ronaldo, who in turn offloads to Kulusevski. The Swede then takes too long, allowing the hosts to regroup and crowd the Juventus forward out on the edge of the area.
24'
Alex Sandro gets on the end of Danilo's cross, heading down in an attempt to tee up McKennie inside the area. Just as the American midfielder is about to pull the trigger, Oliveira throws his body in the way to intervene and protect Marchesin's goal.
22'
Chiellini takes five or six touches, weighing up his options before carelessly firing a pass over the head of Alex Sandro and out of play. The Italian centre-back's poor pass perhaps best sums up the visitors' poor start here.
20'
Bentancur has the opportunity to race at Porto's defence but wastes the chance, overhitting his throughball for McKennie through to the incoming Marchesin. A bit more quality there and the American would have been in.
18'
Sanusi appears to have tried a bit too much, throwing himself to the floor and shouting before any contact is made on the left. Nevertheless, the referee sees it differently, awarding the hosts a free-kick, much to Danilo's frustration.
17'
Chiesa's corner comes to nothing as his outswinging delivery gets headed away by Mbemba. The away side then attempt to recycle possession, however, Ronaldo is adjudged to be offside on the far side of the pitch and Porto get the free-kick.
16'
Alex Sandro sends a hopeful cross towards the back post and, after watching the ball take an age through the air, Chiesa meets it with a right-footed volley. Luckily for the hosts, Sanusi is there to block behind for the visitors' first corner of the game.
13'
Chiellini gives away a needless foul on Marega on the left-hand side. With all the Italian centre-back's experience, he should be avoiding conceding clumsy fouls like that. Oliveira plays the free-kick short before seeing his shot deflected behind for the first corner of the game.
12'
Alex Sandro steps in, high up in the left-hand channel before laying off for McKennie. The American midfielder attempts to find Kulusevski's feet in the area, however, Uribe produces a wonderful sliding tackle to cut the throughball out.
10'
Kulusevski gets clattered by his own team-mate Rabiot, leaving the Juventus forward on the floor, clutching his chest. After a brief break in play, no medical attention is required as the Swedish international returns to his feet.
8'
Mbemba is called upon once again, sweeping around to the right channel to dive in front of McKennie before the American can latch onto Chiesa's throughball. Even in the early stages, it is clear to see why Porto's defensive unit only conceded three goals in Group C.
7'
McKennie goes in search of Ronaldo, however, Pepe and Mbemba combine to intercept before the Portuguese forward can capitalise towards the right of goal. It looked like there was in foul in midfield by McKennie in the build-up but the referee wasn't interested as he allowed play to go on.
5'
Chiellini looks slow as Marega is played in over the top by Corona but Szczesny comes rushing out to intervene and saves the blushes of his captain.
4'
What a sloppy start from Pirlo's men, what is Bentancur thinking? The visitors looked comfortable in possession, knocking it around the back before the midfielder's mistake offered Taremi and Porto the dream start to this knockout tie.
2'
M. Taremi has scored a goal for Porto!
A strange start to the game sees Chiesa immediately pass the ball out of play, signalling to the fourth official that a new ball is needed. Porto then do the right thing, launching the throw-in back to Chiesa before play resumes.
GOALLLLL!!! 1-0 PORTO!!! What a start for the hosts as Taremi pounces in front of Szczesny to tap-in from inside the six-yard area. Initially, Bentancur had played a weak pass backwards before Taremi dived in to prod the ball past the Juventus goalkeeper. A goal out of nothing as Pirlo's side are caught napping early on.
1'
Referee Carlos del Cerro Grande blows his whistle to get this Champions League fixture underway!
Hello and welcome to live coverage of the Champions League round-of-16 tie between Porto and Juventus.
The hosts finished second behind Manchester City in Group C, defeating Olympiakos in their final match to extend their European winning streak to five games. Porto’s top-flight struggles have made them part of a fascinating chase at the top of the table. They sit in second, 10 points behind Sporting, having failed to win in their last four domestic games.
After an impressive six-game winning streak, Juventus are winless in two - having failed to hit the net in either domestic outing. Currently fourth in Serie A, the visitors will be looking to recreate their previous continental form, which saw them dispatch of Ronald Koeman’s Barcelona to top Group G.
PORTO (4-4-2): Agustin Marchesin; Zaidu Sanusi, Chancel Mbemba, Pepe, Wilson Manafa; Corona, Mateus Uribe, Sergio Oliveira, Otavio; Mehdi Taremi, Moussa Marega.
SUBS: Romario Baro, Felipe Anderson, Francisco Conceicao, Diogo Costa, Malang Sarr, Evanilson, Luis Diaz, Toni Martinez, Mamadou Loum, Nanu, Marko Grujic, Joao Mario.
JUVENTUS (4-4-2): Wojciech Szczesny; Alex Sandro, Giorgio Chiellini, Matthijs de Ligt, Danilo; Adrien Rabiot, Rodrigo Bentancur, Weston McKennie, Federico Chiesa; Cristiano Ronaldo, Dejan Kulusevski.
SUBS: Nicolo Fagioli, Paulo Dybala, Merih Demiral, Aaron Ramsey, Carlo Pinsoglio, Alessandro Di Pardo, Alvaro Morata, Leonardo Bonucci, Federico Bernardeschi, Gianluca Frabotta, Gianluigi Buffon.
Pirlo will surely have to make some alterations if his side are to get back into this game. Perhaps he could bring on Morata, who is Juventus' top scorer in this competition, to partner Ronaldo up top and provide the combination of Mbemba and Pepe a different challenge. In contrast, Conceicao will be delighted with his team's performance as of yet and will simply be asking for more of the same.
Before these two sides reunite in Turin in the second leg, Pirlo's side next host Crotone as they look to improve on their fourth-placed Serie A position. Conceicao's men, who were mightily impressive in this tie, next travel to Maritimo as they look to reduce Sporting's 10-point advantage at the top of the Primeira Liga.
That is all from this Champions League round-of-16 clash, until next time!
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