Manchester United boss Erik ten Hag cancelled a planned day off on Sunday after the 4-0 humiliation at Brentford.
With no game until the visit of Liverpool to Old Trafford on 22 August, Ten Hag had intended to let his squad have the rest of the weekend off.
However, the manner of Saturday's loss prompted him to revise his plans.
United's players were back at the club's training HQ earlier today.
Ten Hag was at Carrington early on Sunday to mull over the nature of a defeat that has drawn plenty of criticism from both fans and pundits.
