Chelsea boss Maurizio Sarri ripped into his players after their disappointing defeat to Everton.

Chelsea's hopes of a top-four finish were dented as Everton finally ended a 25-match run without a win against a top-six side with a 2-0 victory at Goodison Park on Sunday.

"I don't know what happened," Sarri told Sky Sports. "We played the best first half of the season, we could have scored four or five times, and then suddenly we stopped playing - it's very strange.

"I cannot understand it. We changed the system but it was the same. It's very difficult - I think the problem was mental.

"If you have a mental problem suddenly on the pitch the system and the tactics is not enough."