Chelsea pass it around the Palace press in the middle. Wilfried Zaha turns away and flaps his arms.

He's clearly frustrated but that won't help his side get back into this.

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Another devastating attack from Chelsea. Mason Mount and Ben Chilwell move through the gears down the left.

Chilwell gets into the box, checks inside and has options - Mount and Callum Hudson-Odoi in the middle - but he tries to go alone, curling it wide of the far post.

Mount is screaming 'CHILLY' in the box and Thomas Tuchel does a hop and a spin on the touchline.

Off we go again. No changes at the break.

No shots (on or off target) from Palace, no corners, 33% possession and 215 total passes in comparison to Chelsea's 418 in that first half.

This would have been goal of the season contender material. A flick over Gary Cahill's head before a decent strike from Kai Havertz.

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Thomas Tuchel grabs Callum Hudson-Odoi as the players head down the tunnel. He's giving him some quick individual analysis.

Love that.

Some of the best football I've seen from Chelsea in months. A really excellent first half.

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Joel Ward goes on a searching run down the left and wins a throw-in in the corner.

Jordan Ayew tries to hit it off Ben Chilwell for a corner but it comes off the Palace man last.

Callum Hudson-Odoi is enjoying himself today too. He cuts inside off the right again but can't find the finish.

But here is Wilfried Zaha. Mateo Kovacic gives it away with a loose touch and Zaha picks it up.

He immediately knocks it past Cesar Azpilicueta and beats him for pace. Zaha then tries to cut it back for Christian Benteke but it's intercepted near the edge of the box.

Luka Milivojevic wins a throw-in on the left but Wilfried Zaha still looks like a frustrated figure.

Palace can't get the ball to him and he's running in circles chasing Chelsea's midfield at the moment.

Thomas Tuchel seems pleased on the touchline but he does keep gesturing to 'push.' He senses there's a few more goals in this for Chelsea if they can really see it off in the first half.

All four of Mason Mount's Premier League assists this season have been for headed goals from set piece situations, with three of those being scored by Kurt Zouma.

Another good delivery from Mason Mount from the corner. Kurt Zouma is the first to it again and Patrick van Aanholt nods it away off the goalline.

This is seriously ruthless stuff from Chelsea.

Callum Hudson-Odoi lays it off to Mason Mount and he steps outside of Gary Cahill before firing a powerful shot towards the near post.

The corner then comes through to Ben Chilwell and Cahil gets an important block in.

Cheikhou Kouyate completely takes out Ben Chilwell on the counter. Straight into the book.

Callum Hudson-Odoi bundles his way through on the right but Gary Cahill puts the block in.

The corner comes in for Kurt Zouma but again Cahill is there.

Jordan Ayew is back defending in the left corner as Christian Pulisic tries to link up with Ben Chilwell.

He has no other option but to hoof it down the line and Chelsea have possession back with Antonio Rudiger.

Kai Havertz has arrived.