Edouard Mendy – 6
A quiet afternoon for the goalkeeper who once again could do nothing about the goal conceded.

Ward-Prowse sent him the wrong way with an emphatic finish from the spot.

Trevoh Chalobah – 8
Showed great anticipation to head in at the back post and put Chelsea 1-0 up early on.

Also kept Nathan Tella relatively quiet though did fail to stop the forward putting in a couple of dangerous crosses.

Thiago Silva – 7
Was handed the task of keeping a lively Adam Armstrong quiet and performed it well, crucially blocking one of the striker’s shots which almost ended up in his own net.

He showed no signs of fatigue after playing in mid-week and that will please both him and his manager.

Antonio Rudiger – 7
A brilliant first-half run combined with spectacular vision put Romelu Lukaku through but his fine finish was ruled out for offside.

Was untroubled in defence and helped Silva deal with Armstrong.

Cesar Azpilicueta – 6
Was exposed on the right-flank alongside Chalobah at times due to the clever runs of Tella.

The Spaniard got forward whenever he could in the second half however and supplied the cross for Werner to put Chelsea back in front.

Ben Chilwell – 5
His lack of game time showed in the second half as he went to ground rashly and brought down Tino Livramento for Southampton’s penalty.

But he made amends late on with a fine half-volley to seal the three points.

Mateo Kovacic – 6
Was the launchpad for much of Chelsea’s counter-attacking play in the absence of Jorginho.

He tired after playing in mid-week and Chelsea looked a lot more energetic once he went off.

Ruben Loftus-Cheek – 7
Added some much-needed energy to the midfield after recent defeats with his direct approach on the ball.

Played a pivotal role in the opening goal with a flick-on from the corner which was turned in by Chalobah.

Callum Hudson-Odoi – 5
Provided pace to the Chelsea attack but his lack of understanding with Chilwell and Lukaku led attacks to break down.

Was much quieter after the break and failed to make the most of his opportunity starting in the front three.

Romelu Lukaku – 4
Failed to keep pace with Werner on the break or take up good positions in the box to meet the German’s crosses.

Will be frustrated at the lack of chances created for him but he didn’t help himself much either as his goalless run stretched to five matches.

Timo Werner – 8
Thought he got his first goal of the season with a header at the back post that was disallowed by VAR due to an earlier foul by Azpilicueta.

But he was lively throughout and his pace caused problems for Southampton, before his clever positioning allowed him to tuck home Chelsea’s second.

Subs
Mason Mount (on for Hudson-Odoi) – 6
Unsurprisingly he was met with loud applause as he warmed up on the touchline and the decibel levels increased drastically when he was brought onto the field of play.

But the fan favourite lacked sharpness and could only shoot straight at McCarthy when presented with a good chance inside the box.

Jorginho (on for Kovacic) – 6
Was brought on with Chelsea needing to wrestle back control of possession and did exactly that.

He put his side on the front foot and repeatedly found Azpilicueta on the right, who started to cause Saints all sorts of problems.

Ross Barkley (on for Loftus-Cheek) – 5
His impact led to two Chelsea goals as he gave Southampton yet another attacker to deal with.

Will want more minutes to show exactly what he can offer but he seems to be a part of Tuchel’s plans currently.