Oleksandr Zinchenko's pass is cut out but City have it back almost immediately.

Raheem Sterling threads in Kevin de Bruyne but he's a few yards offside.

Chris Sutton
Former Premier League striker on BBC Radio 5 Live

Chelsea have missed some big opportunities, Timo Werner in particular.

It has been a frenetic start to the game.

Image source, Getty Images

City try to calm things down a little bit now. Kevin de Bruyne then pokes it through to Raheem Sterling but Thiago Silva reads it.

Chris Sutton
Former Premier League striker on BBC Radio 5 Live

N'Golo Kante is everywhere in the opening 15-20 minutes, Chelsea are countering so well.

He just could not direct the header on target.

Phil McNulty
BBC Sport chief football writer in Porto

John Stones has had an error-riddled start to this game and Manchester City are very grateful Timo Werner has wasted two big chances. He has to take at least one of those.

Chelsea fans have not lost faith, though, loudly cheering his name.

Mason Mount is absolutely bossing things for Chelsea.

He lays it off to Ben Chilwell and the full-back lifts a nice cross in towards the back post.

Unfortunately for Chelsea, it's N'Golo Kante on the end of it. Despite his lack of height, he still wins the header but he's stretching and it's over the bar.

And as Chris Sutton said, Thomas Tuchel was roaring the crowd on after that Timo Werner miss.

The atmosphere has been electric and so has the start to this match!

John Murray
BBC Radio 5 Live commentator

Amazing to think this is Thomas Tuchel's 30th match as Chelsea manager and it is a Champions League final.

Chris Sutton
Former Premier League striker on BBC Radio 5 Live

How many opportunities does Timo Werner need? He should have buried it, a tame shot at Ederson.

Thomas Tuchel is rousing the Chelsea fans up now.

From the corner, Ederson immediately sets Kevin de Bruyne on his way.

Mason Mount, again, sprints back to win the ball for Chelsea.

Timo Werner x2!

He really, really needs to score these.

Mason Mount wins the ball back for Chelsea. He finds Ben Chilwell on the left and his pass ricochets kindly for Mount.

He is through in the box, could shoot but opts to tee up Werner instead. He can't get it out of his feet and pokes it straight at the keeper.

A few seconds later, he blasts one at Ederson which is tipped behind for a corner!

Timo Werner is played in behind on the right again. He's been found in that position a few times already.

Ruben Dias mops up on the edge of his box though.

Chris Sutton
Former Premier League striker on BBC Radio 5 Live

Image source, Getty Images

Timo Werner was really wasteful, that is an air shot as he totally missed the ball.

He just had to concentrate from seven yards out and that is a big opportunity.

This hasn't been a quiet start.

Ilkay Gundogan trips up Mason Mount and the Chelsea fans voice their distaste.

End-to-end!

Raheem Sterling can't find a team-mate as Man City immediately break down the left.

That was his moment!

Timo Werner is teed up by Kai Havertz in the box and he completely misses the ball as he tries to shoot.

No, no, nooooo.

Image source, Opta

Raheem Sterling (L) and Riyad Mahrez (R) are hugging the respective flanks. Manchester City's attack is playing very wide in an attempt to stretch the Chelsea defence.

Phil McNulty
BBC Sport chief football writer in Porto

Image source, Getty Images

Early stages but Phil Foden already at the heart of it all, demanding the ball, linking the play and with the deceptive strength to just shrug off Reece James.