Rafael van der Vaart has criticised Erik ten Hag for his reluctance to use Casemiro since the Brazilian's £70m arrival from Real Madrid at the end of the summer.
Casemiro was once again a substitute as Manchester United succumbed to a heavy defeat at the hands of their rivals Manchester City in the derby on Sunday.
Joining an ever-growing cast of former players to have criticised Ten Hag's team selection, Van Der Vaart said his compatriot had created a rod for his own back in not throwing Casemiro in from the start.