Manchester United are assessing the fitness of key players ahead of the game with Brentford at the weekend. Manuel Ugarte played for Uruguay against Ecuador in a World Cup qualifier which kicked off in the early hours of Wednesday morning. Ugarte limped off late in the game, before flying straight back to England and returning to Manchester United. Ugarte was not part of the Manchester United training session on Thursday, which saw Noussair Mazraoui, Alejandro Garnacho and Amad Diallo return. Manuel Ugarte latestManuel Ugarte was back at Carrington. However, he was simply taking part in a sepa…