Chelsea winger Mykhailo Mudryk has said he is shocked after being notified of a positive drugs test by the Football Association. Reports in Ukraine on Tuesday suggest a prohibited substance was found in an "A" sample given at the end of October. Those same reports state the "B" sample has not yet been tested but will be in the coming days. Confirmation that Mudryk has used a banned substance could trigger a lengthy ban from football, potentially up to four years. A source told ESPN that Mudryk has been provisionally suspended pending the outcome of an investigation but the FA and Chelsea refused to confirm this when contacted by ESPN. Mudryk, 23, has missed the club's last five matches with head coach Enzo Maresca citing illness as the reason for his omission. "I can confirm that I have been notified that a sample I provided to the FA contained a banned substance," Mudryk wrote on Instagram. "This has come as a complete shock as I have never knowingly used any...