Gauff hadn't played since losing in the first round at Wimbledon and appeared to have made a change to her serving grip during her time away

Gauff's serve changes are still embedding into her tennis. But she has other ways to win when the double faults start.

It’s not often that the world No. 2 goes two months without winning a match, but that’s the reality Coco Gauff was facing late Tuesday night in Montreal, on the cusp of a third consecutive loss, this time in her opening duel at the Canadian Open.