Anthony Taylor is over to the touchline to speak with Jose Mourinho and the fourth official.

There's replays being shown of something being thrown on the pitch in the direction of Kepa.

Ben: That extra kick from Son certainly does not look like an accident. Not sure what legitimate purpose it could serve.

Phil McNulty
BBC Sport chief football writer

Red card for Son. He can look as astonished and upset as he likes but he raised his boot. Rudiger over-did it in reaction but Son definitely raised his boot into his ribs.

He's off!

VAR had a look and deemed the second movement of his foot up the body of Antonio Rudiger warrants a red card.

Big decision and Tottenham have even more of a mountain to climb.

Video Assistant Referee - possible red cardpublished at 17:51 Greenwich Mean Time 22 December 2019

17:51 GMT 22 December 2019

Tottenham 0-2 Chelsea

VAR is having a look at a challenge by Son Heung-min on Antonio Rudiger. The Tottenham forward does catch the Chelsea defender with a boot after a challenge, but was it intentional?

Still not really happening for Tottenham. Harry Kane isn't in the game.

Moussa Sissoko goes in late on Willian after the Chelsea forward gets a cross in from the left and the Tottenham man is in the book.

Stevie Boy: Dele Alli needs to get into the game, at the minute he isn’t.

Jermaine Jenas
Ex-Tottenham and Newcastle midfielder on BBC Radio 5 Live

A lot of Chelsea's key performers have stood up and been counted today. Willian has probably been the best player on the pitch. I think the defensive three have shown pace and power - they have not lost many battles today have they.

Marcos Alonso thumps a venomous strike at goal, Paulo Gazzaniga stops it but the ball squirms loose and Tammy Abraham is there to tuck in the rebound but he did so from an offside position and it won't count.

That all came from another quick break by Chelsea after a Tottenham attack broke down. That's something Jose Mourinho needs to be wary of.

M.Saad: A team with Mourinho in charge should not be underestimated. We are 2-0 up, but I’m only celebrating till after the 85th minute, where we still have that two goal cushion.

Serge Aurier bends the ball behind the Chelsea defence but too close to Kepa and the goalkeeper gathers. Tottenham look more of a threat, but are also leaving more gaps at the back.

Jermaine Jenas
Ex-Tottenham and Newcastle midfielder on BBC Radio 5 Live

Serge Aurier did not have the best 45 minutes but already you can see that Tottenham, when they are building up they will have more people up the pitch. Aurier and Moura will be able to push Alonso and Azpilicueta back. They will have more of a presence in the game.

Lots of space for Chelsea to attack as Mason Mount takes the ball up field. He plays in Tammy Abraham on the right and the striker attempts the return pass but it is cut out. Willian, quite rightly, hops in frustration. He was free on the other side of the box.

Kepa races out of his area to beat Son Heung-min to the ball as Tottenham look to attack immediately.

Ben: Today shows that Frank is the best person to be in charge of Chelsea right now. His tactics today have been fantastic, and have have put Mourinho on the defensive. Spend well in January and we will be golden until the end of the season.

Andy Kershaw: If I were Daniel Levy, I would be storming into that Spurs dressing room and totally blowing my top. What a totally abject and dismal performance! How can you give a pay-cheque to players when they perform like that??!!

Image source, Getty Images

Another Jose Mourinho second-half comeback on the cards? We're back under way.

Jose Mourinho needed to do something and he has. Christian Eriksen is on for Eric Dier for the second half.