Reports in British media are claiming that several Chelsea players have tested positive for the deadly coronavirus (COVID-19).
Naija News reports that this is linked to the delay in the kickoff of Chelsea pre-season activities.
The reports, however, 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.
Sheffield United, Brighton & Hove Albion and West Ham United were among the other English 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.
Chelsea, who finished 4th in the Premier League last season, have already completed deals for Hakim Ziyech, Timo Werner and Ben Chilwell from Leicester City.