66 mins: Martinelli manages to createa situation where he can run at Pepe. He goes around the defender and takes the ball into the box but Varela scurries back and wins the ball for the hosts.

Great defending.

63 mins: Gonzalez yanks back Havertz after the Arsenal man wins the ball off Varela and looks to drive forward through the middle of the pitch.

The foul is committed right in front of the referee who brandishes a yellow card.

60 mins: Kiwior brings Conceicao down just outside the penalty area and the home side have the chance to trouble the Arsenal goalkeeper.

The free kick is flicked in from the right by Wendell who curls it over everyone and straight out of play.

57 mins: At the other end of the pitch, the younger Pepe is slipped into the right side of the area. He has the chance to shoot but tries to backheel it for Conceicao only to give possession back to Arsenal who walk it clear.

54 mins: Martinelli is starting to come alive. He carries the ball into the box and curls in a cross. Pepe nods it away but Martin Odegaard recovers the ball and shoots from range.

He hits the ball well but sends it straight at Leandro Trossard who can’t get out of the way.

51 mins: Martinelli manages to weave his way into a bit of space but Conceicao grabs his shirt and cynically pulls the winger to the floor.

It’s an easy decision for the referee who pulls out the yellow card.

48 mins: Martinelli is caught after collecting a loose ball but Porto are awarded a free kick because of a foul previously committed by Jakub Kiwior.

The match seems as physical as it did in the first half.

Arsenal get the ball rolling again for the second half.

The TNT Sports pundits, Rio Ferdinand and Martin Keown, both agree that the Gunners can leave this match with a draw but don’t want to concede in the next 45 minutes.

Mikel Arteta will want to win this one though.

Porto have two players called Pepe in their side tonight.

One is a 40-year-old veteran Portugal defender who won this trophy three times with Real Madrid. The other Pepe is a 26-year-old Brazilian winger.

With Francisco Conceicao (21) and Otavio (21) both starting tonight, FC Porto have named two players aged 21 or under in the starting XI for a Champions League knockout stage game for the first time since March 2018 v Liverpool (Diogo Dalot and Bruno Costa).