Robbie, the host of Arsenal Fan TV, put his neck on the line on the journey up to Manchester on Sunday.
The Gunners head to Old Trafford needing three points to keep up with Leicester at the top of the league.
The Foxes have a five point lead over Arsenal in the title race.
Man United have a load of injuries for the game, and that has instilled belief in the Arsenal Fan TV boys that they can get their first win at United in a very long time.
Watch the prediction below.