Arsenal v Manchester United: Five Key Battles That Will Decide Saturday’s Game

1) Alexis Sanchez v Antonio Valencia

It’ll be an all South American affair on one flank if Louis Van Gaal opts to play Valencia at right-back. The Ecuadorian is not a natural there, but his pace and determination make him a capable stand in. He will have his work cut out against the formidable Sanchez however, who can make the difference for Arsenal if he’s given the ball regularly in the right positions.