Chelsea centre-back Kalidou Koulibaly has revealed what new head coach Frank Lampard did to ‘motivate’ Chelsea players when he arrived back at Stamford Bridge.

“When you change managers, it’s like you failed somewhere,” Koulibaly told The Times. “You have to keep on fighting, and we’ll give everything.

“Our new manager is a big legend, so we have to be behind him. We know we can do better – and we will.

“[He] made a nice speech and tried to speak with everybody and involve everybody.

“I know that is difficult when you have a lot of players, like us, but he was really motivated and really motivated us.”