Mason Mount apologised to Frank Lampard after playing football with Declan Rice in public despite being advised by Chelsea to isolate himself due to the Coronavirus outbreak.
The 21-year-old was spotted taking part in a kick-around at Barnet on Sunday with West Ham midfielder.
Chelsea announced last week that Callum Hudson-Odoi had tested positive for coronavirus, and advised the first-team squad and coaching staff to isolate themselves.
According to MailOnline, Mount has personally apologised to Lampard during a phone call, while the Chelsea midfielder and the rest of the squad have been reminded of their responsibilities.
Rice, however, has been placed under no restrictions by West Ham and there is no indication that he was aware of Mount’s order to self-isolate, as per Chelsea’s request.
West Ham manager David Moyes has spent seven days in self-isolation after coming into contact with Arsenal boss Mikel Arteta, who has also tested positive for the virus.
However, Moyes never developed any symptoms of coronavirus and has now come out of isolation.
Chelsea were due to face Bayern Munich this week in the Champions League but their fixture has been postponed.