Several Chelsea players have not returned for pre-season training after testing positive for Covid-19, according to reports in British media.
The reports did not name the players and Chelsea did not immediately respond to a Reuters request for comment.
Players who test positive have to self isolate for 10 days and return a negative coronavirus test before they can take part in training.
Frank Lampard's pre-season plans dashed as Chelsea are hit by Covid-19 outbreak... with MULTIPLE players testing positive | @AdrianJKajumba https://t.co/Me7il48RMj
— MailOnline Sport (@MailSport) August 26, 2020
Sheffield United, Brighton & Hove Albion and West Ham United were among the other Premier League clubs to report positive COVID-19 cases in recent weeks, the Times said.
Frank Lampard's side, who finished fourth last season, kick off their campaign against Brighton on Sept 14.