LONDON -- Diego Costa trained alone on Sunday and Monday and will be assessed by Chelsea's medical staff and Antonio Conte before a decision is made on whether he can rejoin the rest of the squad, sources at the club have confirmed to ESPN FC.
Chelsea's players were given two days off by Conte after Saturday's 3-0 away win over Leicester City stretched their lead at the top of the Premier League to seven points, but Costa was present at Cobham after being omitted from the squad that travelled to the King Power Stadium.
After the match Conte insisted that Costa's absence was simply due to a back injury, but sources told ESPN FC on Friday that the Spain international had been sent to train alone for three days last week after becoming embroiled in a heated argument with a fitness coach and Conte.