FULL TIME: Barcelona 4-1 Roma- Champions League
BARCA 4-1 ROMA
90: There will be THREE minutes of added time...
GOAL! BARCA 4-1 ROMA (Suarez, 87)
Disaster for Roma, who had only just got themselves back into the tie. Denis Suarez's low cross rebounds off Fazio and into the path of Suarez, who picks his spot to score his first Champions League goal in over a year.
85: SUB! Another Barca change as Iniesta is replaced by Denis Suarez.
83: SUB! Roberto is replaced by Andre Gomes.
GOAL! BARCA 3-1 ROMA (Dzeko, 80)
It's a crucial away goal for Roma and it's been coming. Perotti's pas picks out Dzeko on the penalty spot and the striker holds off the challenge of Alba before sliding the ball into the bottom corner of the net.
79: SAVE! Another Ter Stegen save as he flies to his left to keep out Perotti's strike.
78: SAVE! Ter Stegen's initial error gifts Roma a glorious chance for an away goal. The goalkeeper gives away possession and the ball drops to Defrel in the penalty area. The substitute gets a powerful strike away on goal but Ter Stegen flings himself to his right to make a superb save.
77: SUB! De Rossi is replaced by Defrel as the visitors make their final change.
76: CORNER! Roma go short an Kolarov whips the a cross straight into the hands of Ter Stegen.
75: BLOCK! Perotti's excellent cut back picks out Strootman but the Dutchman's shot is brilliantly blocked by Pique.
72: SUB! El Shaarawy is introduced in place of Florenzi.
69: SAVE! It's not been Messi's night so far. Roberto picks him out just inside the penalty area but once again, his effort is weak and easily saved by Alisson.
66: SUBS! Busquets, who is returning from injury, is replaced by Paulinho.
A few minutes earlier, Gonalons replaced Pellegrino for the visitors.
All over as a contest on the night, seemingly, but still time to check out Sky Bet's latest in-play offers, including Lionel Messi to score two (or more) enhanced from 12/1 to 14/1. Click here to bet live on the action.
63: Roma's objective must surely be an away goal now as Kolarov drives into the penalty area. Alba stands strong though and blocks the full-back's shot.
GOAL! BARCA 3-0 ROMA (Pique, 59)
And at the other end Pique pops up to put Barca firmly in control of this tie. Messi's inch-perfect pass releases Suarez, who forces Alisson into a smart save low down to his left. However, the ball rebounds out to the edge of the six yard box and Pique is there to tap into an empty net.
58: BLOCK! Roma work the ball to Dzeko in the penalty area but his shot is blocked by Pique.
GOAL! BARCA 2-0 ROMA (Manolas OG, 55)
How's your luck, Roma? Messi and Rakitic combine after a short corner and the Croatian slides a brilliant cross across the face of goal. Umtiti's there for the hosts and his initial shot comes back off the post before hitting Manolas and creeping over the line.
BARCA 1-0 ROMA
53: SAVE! Messi does the hard work, beating Fazio on the edge of the the penalty area but his right-footed shot is straight at Alisson, who makes a comfortable save.
50: What's Umtiti doing? He dwells on the ball in his own penalty area and Florenzi nips in to win the ball. Luckily for Barca the ball creeps out of play as he pulls the ball back from the byline and onto the post via Ter Stegen.
48: CHANCE! Alisson makes a mess of Alba's long-range effort and the ball drops to Suarez, who steers the rebound over the crossbar.
46: WHAT A CHANCE! The ball reaches Perotti at the far post but unmarked on the edge of the six yard box, he can only guide his header wide of the far post.
46: Roma gets us back underway at the Nou Camp...
Half-time: Barcelona 1-0 Roma
The half ends with Messi seeing another shot blocked. Barcelonawon’t mind to much. They’re ahead thanks to Daniele De Rossi’s freakish own goal, though Roma have played well and definitely aren’t out of this yet.
GOAL! BARCA 1-0 ROMA (De Rossi OG, 38)
It's a moment of misfortune for De Rossi, who slides in to win the ball ahead of Messi just inside the penalty area but in doing so he steers the ball past Alisson and into the bottom corner. Could he have done better with his clearance? Possibly, but if he hadn't have made the tackle Messi would have been in on goal.
38: Iniesta slides the ball through for Messi but he's denied by a last-ditch tackle from Manolas.
35: Messi gets the ball on the edge of the box but suddenly there's bodies everywhere trying to block what the Argentine is trying create. It works for the visitors as Pellegrini smuggles the ball away from Rakitic.
32: Perotti swings the ball into Barca box, forcing Umtiti to head the ball clear at the near post.
31: WIDE! Alba's pass bounces nicely into the path of Iniesta, who strikes the ball high over Alisson's crossbar.
28: SAVE! Messi's flick releases Suarez in behind. the striker's arrows towards the far corner but Alisson's outstretched hand diverts it away from goal.
27: Semedo marauds down the right before attempting a square pass to pick out Messi. However, Strootman tracks back to intercept the pass.
25: Roma haven't really got going as an attacking force in this tie yet but their defensive discipline has been excellent so far.
22: CORNER! Rakitic drills the ball to the back post but Suarez's poor touch sees any potential opportunity disappear.
21: Messi shows some fancy footwork on the edge of the penalty and the ball falls kindly for Rakitic, whose shot is deflected over the crossbar...
18: POST! The ball rebounds out to Rakitic and from the left edge of the penalty area he curls the ball through the legs of Dzeko and beyond the dive of Alisson, but the ball rebounds back off the post.
17: Busquets clips a delightful ball forward for Alba, who cushions the ball back for Suarez. The Barca striker takes aim from distance but the ball is deflected behind for a corner..
14: Umtiti plays a beautifully weighted pass in behind Peres for Alba. The Roma full-back recovers well though, sliding in to divert the ball away to safety.
11: Messi turns onto his left foot, 20 yards from goal. He strikes the ball goalwards, forcing Alisson into action. The goalkeeper palms the ball away and gets to his feet to collect the rebound.
10: NO PENALTY! There's a coming together between Semedo and Dzeko in the penalty area as Pellegrini slips the ball through for the striker. The Bosnia goes to ground rather easily but the referee is not fooled, awarding Barca a goal kick.
7: NO GOAL! Suarez sticks the ball in the back of the net but he's clearly a couple of yards offside as he latches onto Iniesta's pass.
4: Semedo plays a nice one-two with Roberto before whipping in a cross from the right flank. Fazio is well positioned at the near post to clear for the visitors.
2: An early scare for Barca as Perotti's cross bounces in the penalty area but Alba comes across from left-back to clear ahead of Florenzi.
1: KICK-OFF! The hosts get us underway at the Nou Camp...
The teams are out at the Nou Camp as the Champions League anthem rings out around this famous old ground.
Barcelona: Ter Stegen, Roberto, Semedo, Pique, Umtiti, Alba, Rakitic, Busquets, Iniesta, Messi, Suarez.
Subs: Cillessen, Denis Suarez, Dembele, Paulinho, Alcacer, Gomes, Vermaelen.
Roma: Alisson, Peres, Fazio, Manolas, Kolarov, Strootman, De Rossi, Pellegrini, Florenzi, Dzeko, Perotti.
Subs: Skorupski, Jesus, Gonalons, Gerson, El Shaarawy, Schick, Defrel.
FORTRESS NOU CAMP
Since the start of 2013-14, Barcelona have not lost a single Champions League match at the Nou Camp, winning 23 and drawing two games there in this period. In these games, they've outscored their opponents 77-12
Will we see more Messi magic tonight?