Hello and welcome to our LIVE coverage of Porto vs Chelsea in the second round of fixtures in the Champions League group stage! Team news to follow shortly...

CHANCE! Costa hits the cross bar with a superb effort from the left side of the penalty area. Casillas is nowhere near it but the cross bar comes to the rescue.

Superb movement we've just seen on the replay. He comes from the goal line and round Ramires who hasn't received a shout and he nips in front. Lovely stuff.

GOAL! Corner comes in at the near post from Neves and Maicon comes steaming in to glance it home. A very basic goal to defend but Chelsea have conceded.

Willian with a ball into the box but he puts too much on it and Casillas can easily watch it go out. Brahimi with that footwork again which sends Cahill spinning but his cross is well blocked by Zouma.

Willian absolutely scythed down by Andre as he wriggles through the middleReferee blows his whistle and uses the opportunity to speak to Lopetegui. Looked like a storng word.

Effort from distance by Neves central but he can't bend the ball in and it flies wide of the post. Begovic just watches it go wide.

Fabregas tries to round Marcano but he's too strong and the central defender brings the ball forward.

Willian does excellently to get to the byline with a nice flick and lay back in by Azpilicueta. He plays it low to Costa but he can't get it out of his feet and Costa's shot is blocked.

Here we go. Second half is underway. Let's see how Chelsea and Porto respond to those late goals in the first half!

And that's half time! A thrilling end to a relatively even half!

GOAL! Right on half time and Willian just smashes the ball into the back of the net from that free kick. They're celebrating and the ref has blown for half time. It goes around the wall and Casillas is stranded. He should have saved that really.

The ref just sorting out the wall. A whole mess of players in there.

Good bursting run forward from Ramires who shows great feet to float into a shooting position but is upended by Maicon on the edge of the area. Chelsea taking their time on this one. A great position.

Maicon taking his time with the ball there as Fabregas comes and closes him down. Got away with knocking it against his hand and the ref blowing for a free kick. Could have been dangerous that.

Andre with good pressure on the ball in the middle and upends Fabregas. Free kick but Porto are in their shape and looking comfortable.

Yellow for Cahill after cynically bringing down Aboubakar on the half way line. A bit of frustration that looked like.

GOAL! Imbula wins it in the middle and lays it wide to Brahimi who turns Ivanovic inside out and gets his shot away from a tight angle. Begovic makes a great save but it drops to Andre's feet who tucks it away as the goalkeeper attempts to scramble back. He took that well and Porto have the lead.

Neves lays it in to Pereira in behind Willian and gets his cross away but Zouma does well to clear.