Gauff, 15, played Williams, 39, to begin her first appearance in the main draw at Melbourne Park, as she did at Wimbledon last year. The youngest woman in the field got the better of the oldest woman in the field, with Gauff beating Williams 7-6 (5), 6-3 on Monday.

“I definitely was more confident this time. I think I was used to playing on big courts, so the crowd — I guess the size of the crowd didn’t startle me as much as last time,” 

Gauff said