Chelsea manager Maurizio Sarri says his side have reached their mental "limit" after their top-four hopes were dented by Everton's second-half resurgence. As a result, the visitors failed to capitalise on their game in hand, and still sit sixth in the Premier League table, a point behind Manchester United, who they would have leapfrogged had they won. Victory would also have taken them level on points with fourth-placed Arsenal. "We played probably the best 45 minutes of the season and then suddenly at the beginning of the second half we stopped playing; I don't know why," said Sarri. "It is impossible that the situation is a physical problem because if it is, you can go down gradually, not in one second. "It is very difficult for me to explain the change. Probably it is a mental block." When asked how worried he was that Chelsea's mental situation has not been solved, Sarri said: "At the moment, this is our limit. "If we ...