Manchester United manager Erik ten Hag said Alejandro Garnacho "has to accept" being taken off less than half an hour after coming on as a substitute against Crystal Palace.
Teenage talent Garnacho entered the fray just before the hour mark, replacing Wout Weghorst and allowing Marcus Rashford to move central. The switch paid off, with England forward Rashford doubling United's lead from close range after Bruno Fernandes' penalty had given them a half-time lead.
Things changed, however, when Casemiro was sent off for his part in a 20-man brawl. Palace pulled a goal back through Jeff Schlupp, and Garnacho was withdrawn in a double change which saw centre-backs Harry Maguire and Victor Lindelof introduced as United shut up shop and held on for victory.