Ruud van Nistelrooy's Leicester City will face Man United tonight in the FA Cup 4th round at Old Trafford. Rúben Amorim has explained why the Dutchman couldn't stay.

Dutchman who returned to football as United's No 2 last summer is now back at Old Trafford with a Leicester team labouring against the drop

United knocked Leicester out of the Carabao Cup in October, 5-2 at Old Trafford, and the Foxes lost 3-0 when they returned for a Premier League fixture in November. Ruud van Nistelrooy is now in charge of Leicester and the popular Dutchman will return to Old Trafford for the first since the conclusion of his interim role at United.