It depends on the current state of Benzema. If he already recovers 100% and he is in very good condition, Ancelotti may consider letting him play full-time. But if his condition looks not really good enough to play full-time, Benzema is better to play in the second half of the match. For the first half, Mariano may be the option to put on the CF position. Or let Hazard or Asensio plays in the first 45 minutes. Ancelotti has some possible options to apply on the attacking line.