Diego Costa’s team-mates have given up speculating where the striker might be playing next season. They learned a long time ago that, when it comes to Chelsea’s Dr Jekyll and Mr Hyde, anything can happen.

In January, Costa seemed sure he wanted to go to China, then it became Paris Saint-Germain, despite there being no evidence of interest from the French club and, most lately, he has become excited at fresh contact from Atletico Madrid to take him back to Spain.

Costa, in his happier moments and when the English rain has eased off, has even talked about staying at Chelsea and signing a new contract. Each day, it seems, brings a new outlook and a fresh idea for the future.

Given his closest friends cannot predict whether or not Saturday’s FA Cup final will be Costa’s last appearance in a Chelsea shirt, it is impossible to know for sure whether or not Wembley will provide the setting for his farewell.

Chelsea will hold talks with Costa this summer and will listen to big offers for the 28-year-old. Whether or not Tianjin Quanjian can push ahead with their planned £76million move for the Spain international, following new rules on spending in the Chinese Super League, remains to be seen.