Manchester United's past match results against Tottenham are not good. United have not won any of their last 5 matches against Tottenham. They have lost 4 matches and drawn one. So it will be very difficult for Manchester United to win this match as well.
On that note, I wouldn't judge the finals to go in favor of Tottenham more, all because they had won Manchester United all through their last meetings. The unbelievable can happen in both team's favor