No. 11 seed Paula Badosa of Spain upset American Coco Gauff, the No. 3 seed, in straight sets at the Australian Open quarterfinals.

Coco Gauff will take on Paula Badosa in the Australian Open quarterfinals on Monday, January 20.Gauff beat Belinda Bencic 5-7, 6-2, 6-1 on Saturday in the Round of 16 in her most recent match.

MELBOURNE, Australia — Coco Gauff's retooled forehand and serve abandoned her in the worst way and at the worst time at the Australian Open. The unforced errors just kept accumulating, and so did the double-faults and break points, often followed by a palm placed over her eyes or a slap to a thigh.