The referee blows his final whistle, PSG 2-2 Barcelona
38 GOOOAAAAAAAAAAAAL FOR BARCELONA
90+4 Matuidi receives a headed pass from Ibra with a low shot that deflects off a defender and wrong-foots Alves.
90+4 GOOAAAAAAAAAAAAL FOR PSG
90 The referee adds four minutes of stoppage time. Will PSG be able to at least salvage a draw?
89 Xavi sends the keeper the wrong way to restore Barca's advantage.
89 GOAAAAAAAAAAL FOR BARCELONA.
89 PSG keeper Sirigu brings Alexis down as the referee immediately points to the spot.
88 PENALTY FOR BARCELONA!!
87 At the other end, Ibrahimovic receives a yellow as tensions mount in the latter stages.
85 Barcelona full-back Alves receives a yellow card.
84 Barca's Mascherano is stretchered off after suffering an injury. He is replaced with Marc Bartra.
81 Nine minutes remaining and It's 1-1. PSG are likely to pile on pressure to score another goal and claim a precious win.
80 Ibra makes up for his wasted effort by scoring a hugely controversial goal! He strikes on the rebound after a Thiago Silva header hit the bar. However, television replays show that he was in an offside position.
79 GOOOAAAAAAAAAAAL FOR PSG
77 Ibra squanders a golden opportunity to equalise!! He is thwarted by Valdes from close range after being picked out unmarked.
75 Barcelona defender Javier Mascherano will miss the second leg after receiving a yellow card for fouling Menez.
74 A deflected free-kick by Barca midfielder Xavi goes just over the bar.
73 PSG are playing as if they lost any hopes of equalising. Barcelona are easily moving the ball around.
71 In a rare chance for PSG, Maxwell's low shot is saved by Valdes.
70 The second substitution for PSG. Beckham is replaced with Marco Verratti.
69 A curling free-kick from the impressive Alves goes just wide.
67 PSG's Beckham is booked.
66 PSG make their first substitution. Lavezzi is replaced with Jeremy Menez.
66 PSG midfielder Matuidi will miss the second leg after being booked for a foul on Iniesta.
65 Another chance for Alexis! The Chilean, well-positioned to score, sends a tame shot into the keeper's hand as PSG's defence is once again caught napping.
63 Alexis wastes a chance to double Barcelona's lead!! He is picked out unmarked by a superb cross from Alves but he dithers on the ball, allowing PSG's defenders to intervene and clear the danger.
62 Barcelona's left-back Jordi Alba receives a yellow card.
60 Barcelona look the more likely to score despite Messi's absence. PSG appear jaded in the second period.
57 Ibrahimovic mis-controls a cross as Barca's defence clears the danger following a right-wing cross. The efforts are tame now.
55 Both sides eased off actually.
53 Ibrahimovic is shackled by Barca's defenders. PSG make a less than impressive start to the second half.
51 A rare shot by Sergio Busquets is collected by PSG keeper Salvatore Sirigu.
50 A Fabregas shot is blocked by Thiago Silva.
47 Barcelona lost their most lethal weapon, but they still boast several players who can make the difference.
46 Barcelona make their first substitution. Messi, who scored the only goal, is replaced with Cesc Fabregas after picking up an injury.
The second half is underway
The referee blows his half-time whistle, PSG 0-1 Barcelona
45 PSG are finding it hard to steal possession from the dominant Barcelona.
42 Messi almost scores his second of the night!! His brilliant curling shot goes just over the crossbar.
42 It's an uphill climb for PSG now. Barca also have the psychological edge.
39 In Barcelona's first real chance, Dani Alves picks out Messi with a superb long ball with the outside of his right foot, allowing the World Player of the Year to volley home from a tight angle.
Barca's Chilean winger Alexis cuts inside and sends a low shot that goes just wide.
Statistics show that Barcelona are dominating 68% of posession. But did they make use of that? No, at least until now.
PSG need to make the most of their counter attacks, because a goalless draw will make Barcelona firm favourites to advance.
PSG's midfielder Blaise Matuidi cuts short many of Barcelona's attempts.
PSG are working hard to keep Barca's forwards at the bay. But, as many people know, it can only take the Catalans a half-chance to settle a tie in their favour.
PSG launch a superb counter attack that ends with Ibra sending an angled shot just wide after some good work from Lavezzi.
Barcelona move the ball around but struggle to carve out spaces in a tight backline marshalled by Silva.
Messi gathers a loose ball inside the area but Brazilian defender Thiago Silva steals possession in a timely manner.
Ibra and Lavezzi are forming a potent partnership upfront. They are keeping Barca's defenders on their toes.
Ibrahimovic takes the ensuing free kick, not Beckham. His powerful low shot is saved by Valdes.
Barcelona defender Gerard Pique is booked for a foul on Ibrahimovic on the edge of the area.
Iniesta goes close for Barca!! His curling shot from just inside the area narrowly misses the target.
Barcelona keeper Valdes blocks a low shot from Javier Pastore. PSG are livelier!
PSG are relying on some pinpoint crosses from the right flank.
It's a fast-paced game. Both sides are exchanging attacks, but so far PSG have created the only clear-cut chance.
Barcelona's David Villa just fails to get on the end of a through pass from Andres Iniesta as the visitors pour forward.
Barcelona are lucky to avoid conceding an early opener. Lavezzi's pace could cause them problems tonight.
What a chance for PSG!! They almost go ahead but forward Ezequiel Lavezzi's angled effort hits the post.
It seems PSG opted for the cautious approach. They are sitting back, letting Barcelona dominate possession in the early stages.
Barcelona make their first foray after two minutes, but full-back Dani Alves fouls PSG's Maxwell in the area.
The match is underway
Fifteen minutes remaining before the start. Many people are debating over whether PSG will adopt a cautious approach, or attack from the outset.
Both sides are warming up, 25 minutes before kick-off.
PSG's starting line-up: 30-Salvatore Sirigu; 26-Christophe Jallet, 2-Thiago Silva, 13-Alex, 17-Maxwell; 29-Lucas, 32-David Beckham, 14-Blaise Matuidi, 27-Javier Pastore; 18-Zlatan Ibrahimovic, 11-Ezequiel Lavezzi.
19:30 Barcelona's starting line-up: 1-Victor Valdes; 2-Dani Alves, 3-Gerard Pique, 14-Javier Mascherano, 18-Jordi Alba; 16-Sergio Busquets, 6-Xavi, 8-Andres Iniesta; 9-Alexis Sanchez, 10-Lionel Messi, 7-David Villa.
Barcelona will have playmaker Xavi and defender Jordi Alba back after recovering from hamstring injuries they sustained on international duty with Spain.
PSG are also buoyed by the availability of Zlatan Ibrahimovic, who had a two-game ban reduced to one.
Barcelona's players expressed their delight following the return of coach Tito Vilanova, who is back on the bench after undergoing cancer treatment.
Stay tuned for Ahran Online's special coverage for Champions League quarterfinal clash between Paris St Germain of France and Spain's Barcelona.
Former Barcelona striker Zlatan Ibrahimovic said that playing against his old team would not pose any problem but they will adopt a special tactic to block 'the best team in the world'.
Qatari-backed PSG are facing the toughest mission after knocking out Valencia in the last 16, while Barca, who recovered from a first-leg stumble in their last-16 tie against AC Milan, are widely considered favourites to win the trophy for the fourth time in eight seasons.
Real full preview here
The match kicks off at 20:45 CLT (18:45 GMT)
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