Gary Neville has criticised Manchester United for 'being outrun every single week'.
Ruben Amorim's side suffered a second successive defeat as they were beaten 3-2 at home to Nottingham Forest.
Amorim has frequently changed his starting lineups during his five games in charge and former United defender Neville suggested that the manager needs to decide on his first-choice team.
Neville indicated that Amorim should follow the lead of Chelsea boss Enzo Maresca, who has a more established starting lineup.
Speaking on NBC Sports, Neville said: 'When you keep changing players and you keep changing your back three and you take five players off, you're basically saying to all of them because they've obviously been taken off at the start of the game that you don't trust them.