Chelsea have warned Mykhailo Mudryk to tone down his gym work over concerns that the winger is overdoing his intensive training regime, according to reports.
The Ukraine international - who was signed by the club for a fee that could yet top £88million (€100m) during the January transfer window - is said to subject himself to punishing workouts in a bid to maintain his fitness and recapture the form that brought him to Stamford Bridge.
After dazzling with Shakhtar Donetsk, Mudryk was pursued by a number of top flight clubs, with Arsenal the most persistent suitors before Chelsea swooped to secure the 22-year-old's services.