Chelsea defender Kurt Zouma made his first Premier League start in a year against Manchester City but he was replaced at halftime with Nemanja Matic despite an impressive first half.
Chelsea boss Antonio Conte explained the change was tactical.
“I think Kurt played a really good game but the substitution was tactical because in the first half we were suffering a lot in midfield and they were finding spaces between the lines,” Conte said.
“So I wanted to reinforce the midfield with Matic, bring Azpi into his position and play Pedro as wing-back.
“It was more offensive because your wing-back is more of a winger than a defender.
“In the second half we had more balance and didn’t give them chances to score. We controlled the game well.”