Ole Gunnar Solskjaer has revealed Ander Herrera is the Manchester United player he cannot afford to drop.
Herrera, who has missed just two of Solskjaer's 13 games in charge, broke the deadlock in United's FA Cup fifth-round victory over Chelsea on Monday night.
Interim boss Solskjaer was full of praise for the 29-year-old midfielder following his performance at Stamford Bridge.
'His energy and tenaciousness is vital for us,' he said.
'And that's why he plays, more or less, every single game. He has loads of energy, he can cover the right hand side, he runs forward.