Graham Potter needed to win some control in the Chelsea midfield.
Chelsea drew 1-1 against Manchester United last night and Marc Cucurella was selected to replace the injured Kalidou Koulibaly last night.
But his night lasted only 36 minutes as he was replaced by Mateo Kovacic just before the half-time whistle.
The former Brighton defender has played only one full game under new manager Graham Potter this season.
Both Cesar Azpilicueta and Ben Chilwell operated as wing-backs against Manchester United last night.
Potter explained his decision to take off Marc Cucurella before half-time.
“The sense in the game was that we were getting a little bit overrun in midfield and we needed an extra player in there to create a bit more pressure and stop them building their attacks, and therefore making it harder for us to build ours,” said Potter of his decision.
“It’s just a feeling I had. It wasn’t an easy decision to make at all but the boys responded really well and gave everything.”