Chelsea Brazilian born striker Diego Costa future has been thrown into a major doubt after it emerged that he had a row with Conte’s fitness coach Julio Tous.

Costa did not travel with the rest of the Chelsea squad for their encounter with the premier league champion Leicester City at the King Power Stadium.

Reports suggest that Costa had complained about a back pain but the club’s medical staff saw nothing serious and Conte wade into the row.

The news came amid reports that Costa is subject of a big offer from Tianjin Quanjian thought to be in the region of £30m/year.

Though, Chelsea owner Roman Abramovich is not entertaining any idea of releasing him from his contract which expires in 2019; it’s still a big worry because keeping an unhappy player will be unhealthy for the whole squad.

Costa has scored 14 goals and made 5 assists this season in the premier league.