Oles now greeting every completed Chelsea pass.

... and hits the wall.

Marcos Alonso lines it up...

Mateo Kovacic, following his weekend wonder goal, is urged to shoot.

Ben Davies then fouls Christian Pulisic right on the edge of the Spurs box.

Chelsea are spreading it about nicely, waiting for an opening. They'll be fairly satisfied to take a two-goal advantage into the second leg, but it could have been more.

Nice enough move from Tottenham but it comes to nothing as Tanguy Ndombele's flick can only find Chelsea goalkeeper Kepa.

Giovani lo Celso whips it in and Japhet Tanganga is up to meet it, but can only help the ball over.

How he'd have loved to make amends for a couple of first-half mistakes.

Emerson Royal wins a free-kick on the right. Chance to deliver here...

More changes.

Bryan Gil and Giovani lo Celso for Spurs, with Son Heung-min and Lucas Moura heading off.

Christian Pulisic comes on for Chelsea, replacing Hakim Ziyech, who's had a very good game.

Ooof. Antonio Rudiger hammers a ball into a falling Tanguy Ndombele, who thinks he was fouled bu Cesar Azpilicueta. The Spaniard isn't happy at Ndombele going down and the decision is a Chelsea throw.

Neat play from Chelsea and they open up some space for Marcos Alonso on the left.

The wing-back picks out Hakim Ziyech at the back post, but he lofts an effort over the crossbar.

Ruben Loftus-Cheek combines with Hakim Ziyech down the right but can't pick out a cross once he gets in behind the Tottenham back line.

Tottenham deal with the corner this time. And that gives Chelsea a chance to make a change.

Mason Mount comes off for Mateo Kovacic, while Saul makes way for Ruben Loftus-Cheek.

Spurs will also make a change, with Harry Winks on for Oliver Skipp.

Saul drives deep into the Tottenham half before feeding Romelu Lukaku, who wins a corner off Ben Davies.

This time Sanchez wins the battle with Lukaku and the Chelsea fans want a foul.

Spurs can break but then slow it down and the home side get plenty of bodies back behind the ball.

It's worked out to Emerson Royal, who picks out Lucas Moura and he hooks over. Decent move.

Romelu Lukaku brushes off Davinson Sanchez and Hakim Ziyech threads a wonderful pass into Timo Werner's path. His touch bounces up and the striker looks to dink it over Hugo Lloris, but the oncoming Frenchman gets an outstretched hand to it.

Spurs work it wide to Emerson Royal, but he can't beat Marcos Alonso with a low cross. That was a good chance to deliver a decent ball for the visitors.

Ben Davies picks it up on the left but the outcome is the same.

Bit of a sore one for Harry Kane, but he's back on his feet. Just over 25 minutes to go in this semi-final first leg.

Malang Sarr goes into the book after catching Harry Kane in the face with an arm. Chelsea fans would've been furious if that was anything more after Sunday's Sadio Mane decision...

Kane is down and having some treatment.

Timo Werner has been good since he came on.

He cuts in from the left and looks to pick out the far corner, but it's narrowly wide.

Hugo Lloris was beaten.