The Serbian world number one became the first tennis player to bank $100 million in prize money after his 3-6 6-4 6-1 7-5 win over Spaniard Roberto Bautista Agut tipped him over the magic number.
What he desperately wants is to get his hands on the Musketeers' Cup to complete his grand slam collection.
After winning a match that was originally scheduled for Monday, began on Tuesday and was finally completed on Wednesday, the 29-year-old will have to play four days in succession if he is to reach Sunday's title showdown.
Djokovic will be back in action on Thursday to contest his 28th successive major quarter-final against Czech seventh seed Tomas Berdych, a 6-3 7-5 6-3 winner over 2013 runner-up David Ferrer.
In contrast, Austrian tyro Dominic Thiem was enjoying his most successful run at a grand slam after beating Spaniard Marcel Granollers 6-2 6-7(2) 6-1 6-4 to set up a last-eight clash with Belgian David Goffin.