Good evening and welcome to LIVE text commentary of this opening round of Champions League action. The very latest team news from the Roma and Barcelona camps will follow in a few moments...

Falque is having a good game in midfield for Roma, putting himself in the way of a lot of potential Barca attacks.

Messi swings in Barcelona's first corner of the game, which is headed away by Nainggolan. Roma not comfortable at all at the back though.

PENALTY? Suarez goes down in the box under a challenge from Szczesny. It was a stupid challenge but, despite Saurez's protests, it was not a penalty.

GOAL! Roma 0-1 Barcelona: Suarez heads in from under the crossbar after Rakitic got to the byline and clipped a cross to Suarez at the far post. Roma complaining that Messi fouled Digne in the build-up to the goal - and they may have a point.

Ruediger makes a brilliantly timed tackle on Suarez, who was about to let fly from a good position. No room for error there.

Incidentally, Roma start with 10 different nationalities. It equals their own Italian record for most nationalities in a Champions League match.

VITAL BLOCK! De Rossi throws himself at the feet of Messi, who was about to pull the trigger from a few yards out. De Rossi will be relieved as it was he who gave the ball away in the first place.

Barca controlling the game at the moment. Roma a threat on the break but they need to see more of the ball.

123 goals between Messi, Neymar and Suarez last season. Not bad.

Neymar drives forward down the centre but over hits his ball over the top to Messi.

GREAT MOVE! Slick football by Barca as Neymar finds Iniesta on the overlap, he cuts back for Messi - but the Argentine puts it over the bar.

That was really good play inititally by Dzeko, who left Pique for dead - just couldn't get the ball beyond the well-placed Mathieu.

So close to a big opportunity for Roma as Dzeko races clear of the Barca defence but tries to pick out Salah, and fails.

The home side's supporters growing frustrating that their team cannot keep the ball.

Salah forces a Roma corner after another quick breakaway. Clearly Roma's strategy to hit Barca on the break tonight.

Loose pass by Rakitic goes straight to Salah, who shows Jordi Alba a clean pair of heels as he tries to catch Barca on the break - but the reigning champions gang up on the Egypt star to dispossess him on the edge of the box.

CLOSE! Messi goes close! The forward again drops off the Roma defence to collect the ball and out of nothing, lashes a shot just over the bar from the edge of the box. An early warning for Roma.

Messi comes very deep - inside his own half - to get his first touch and immediately looks for the run of Neymar, but it's dealt with by the Roma defence.

Roma enjoying the best of the early possession. An amazing atmosphere inside the stadium tonight. Roma are going to need their 12th man tonight.

KICK OFF. We're underway at the Stadio Olimpico. Barca playing in light blue tonight.

The warm-ups are done and the players are about to emerge from the tunnel here in Rome. Let me know who you're backing tonight on Twitter @mjdasilva