West Ham boss David Moyes has warned the Premier League that he may take a harder line on fixture rearrangements after his side lost to Leeds.
Twenty-one Premier League games have been postponed from their original dates because of Covid this season.
"Maybe we're not being tough enough, maybe we should've fought harder," said Moyes about his team's schedule.
"Maybe I'm going to do that in the future."
West Ham won their meeting with Norwich on Wednesday - a match shifted from 18 December after an outbreak in the Canaries camp - but Moyes says the energy expended in that victory put his side at a disadvantage.