#2 Tactics
It all boils down to tactics on match day. Solskjaer has shown great maturity and understanding of how he sets his team up for different matches. United's tactics on the day will give them an edge over Liverpool. The Reds are favorites and that could work against them. United have generally lined up in a 4-3-3 formation under Solskjaer.
Paul Pogba, Ander Herrera and Nemanja Matic have been performed in midfield to devastating effect on the opposition. It is the rotation of the front three that has unsettled teams. Sometimes Marcus Rashford starts as the central striker but drifts to the left to allow Jesse Lingard a chance to play as a false nine. So long as United maintain discipline defensively then Liverpool will be in trouble.