How Kenin halted Gauff's run in Australian Open round of 16

Sofia Kenin took advantage of Coco Gauff's unforced errors as the 15-year-old hit a wall after an emotional week.

source http://www.espn.com/tennis/story/_/id/28564010/how-sofia-kenin-halted-coco-gauff-run-australian-open-round-16