#4 Infiltrate the Chelsea defense by making runs in behind

Romelu Lukaku is an injury doubt for the game and his absence will be felt by United. Without the Belgian, the Red Devils lack a strong presence up front who can hold up play effectively.
In his absence, Marcus Rashford or Alexis Sanchez will be deployed as the central striker. Neither of them possesses the strength to hold up play, but their ability to run in behind can be used.
United's midfield three average 0.3 through balls per game combined, which is what Fabregas, Mesut Ozil, and Kevin De Bruyne manage individually.
Sanchez and Jesse Lingard drop down the pitch too often to receive the balls, which eases the opposition's defence.
The United attack should try to run behind the Chelsea backline which will cause more problems. Last season, Rashford showed how to hurt Chelsea as his pace was tough for them to handle. United can certainly employ similar tactics on Saturday.