David Moyes is set to miss West Ham's trip to Leicester on Sunday as he continues to isolate at home after contracting Covid-19.
Manager Moyes and players Issa Diop and Josh Cullen received positive tests on September 22 - an hour before they were due to play Hull.
Diop and Cullen have since resumed team training but Moyes's return to work has been delayed, with the club keeping the reason why confidential.
Moyes has shown mild symptoms previously, perhaps explaining his extended isolation as he and the club follow the Premier League's strict guidelines.