Manchester United defender Harry Maguire urged his team-mates to bounce back immediately after seeing them go down to Premier League basement boys Sheffield United on Wednesday.
The Blades powered to only their second league win of the season at Old Trafford in a shock 2-1 win.
Kean Bryan and Oliver Burke scored the visitors' goals to deny United the chance to return to the top of the Premier League table, after Manchester City went top on Tuesday with a 5-0 thrashing of West Brom.
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Maguire had given his side brief hope with an equaliser on 64 minutes, and he acknowledged that United must return to form as soon as possible in order to stay in the race at the summit.