Ruben Amorim believes the best preparation for Manchester United ahead of the Europa League final would be to shock Chelsea in Friday's Premier League clash rather than resting his key players."The players have to understand that if you play or don't play against Chelsea,

Ruben Amorim has warned his Manchester United players that their places in the Europa League final will be at risk if he does not get their complete commitment against Chelsea.

United currently sit 16th, with just 39 points, and are guaranteed to record their lowest finish of the Premier League era.