Porto vs Arsenal LIVE: Champions League score and goal updates as Galeno hits the post for hosts

38 mins: Nico Gonzalez hits a clean strike from a long way out and David Raya is interested for few a moment before the ball rises up and over the crossbar.

Decent attempt but not troubling for the Arsenal goalkeeper.

Arsenal whip the ball into the box from a corner once more and this time William Saliba gets on the end of it. He doesn’t catch his header quite right and the ball is sent wide of the nearest post.

Arsenal’s best chance so far and Saliba should arguably have done better to find the target.

32 mins: Arsenal have already had 70% possession but I can’t recall a single opportunity to challenge Diogo Costa. The Gunners aren’t finding it easy at all to play through Porto.

Mikel Arteta needs to come up with a solution as Leandro Trossard drills a long range effort into the stands.

29 mins: Gabriel Martinelli is being marked by two players whenever he gets the ball. He’s not been able to run at Joao Mario yet and hasn’t get in behind.

It’s part of a gameplan from Porto which is working very effectively indeed.

26 mins: Arsenal, who have recently been very good at set pieces, are being bullied by the Porto defenders.

Bukayo Saka swings a cross into the middle of the six yard box but the goalkeeper claims it easily as none of the Arsenal attackers can break free of their markers.

Porto should be in front. They attack down the right again and pull the ball back into the middle. Galeno darts ahead of William Saliba before whipping a shot into the far post.

The rebound comes back to the forward who then volleys a second effort wide of the near post and jogs away in disbelief.

21 mins: Joao Mario injects a bit of pace into Porto’s attack as he makes an overlapping run and collects the ball down the right flank.

The defender takes on Jakub Kiwior before looking for a cross. Kiwior gets the block in and the ball loops into the air where David Raya is left with the simplest of catches.

18 mins: Declan Rice swings the free kick into the box but Diogo Costa comes off his line to punch the ball clear without too much trouble.

Porto then attempt to fly forward down the left but Nico Gonzalez runs the ball out of play.

15 mins: Ben White whips a lovely switch of play over to the left wing where Kai Havertz brings the ball under control. He sends it back to Martin Odegaard who is brought down by Pepe for an Arsenal free kick.

There’s a conversation as Arsenal set up the set piece.

12 mins: For a team as flowy and exciting as Mikel Arteta’s Arsenal the early stages of this match have been anything but. It’s slow, steady, and without much intensity.

Passes and being moved across the pitch but there’s no urgency from either team.