He'll also be weary and jet lagged!!!
Sorry! Who will be jet-lagged? Andy or Wawrinka? Casablanca to Monte Carlo is not a huge distance. Admittedly they are in different time zones, but I don't feel that will have a detrimental effect on Wawrinka.
Djokovic's playing surprises me and there maybe an element of selfishness on his part. His doctors advised him to rest for up to 10 days., but he is playing MC. Is this because:-
1. He will lose some points, allowing Andy to creep closer to his no1.
2. Knowing that Ferrer had withdrawn and by playing, Andy would be placed in Nadal's half.
3. He may yet withdraw, but the draw has already been made.
Djokovic often resorts to unacceptable gamesmanship. Witness his MTO before Andy's servicing for USO title and other cases when he used MTO to upset his opponent's play.