MELBOURNE, Australia — It happens in every match that Coco Gauff plays. Sometimes, it happens in every game, or seemingly on every point that doesn’t end quickly. The ball comes sailing over the net ...

While grass-court tennis favors big serves and blistering ground strokes, it also rewards players who mix in subtlety and finesse. Among the favored options at a player’s disposal is the slice.

Coco Gauff’s no-look, cross-court forehand pass against Karolina Muchova sparked an awestruck crowd. The World No. 4 won her fourth round match 6-1, 3-6, 6-3 to book her spot in the Australian Open ...