Paula Badosa thought she might retire due to a back injury. A year later, she's in to the semifinals against close friend Aryna Sabalenka.

No.11 seed and former World No.2 Paula Badosa defeated No.3 seed Coco Gauff in straight sets in the quarterfinals of the Australian Open to reach a Grand Slam semifinal for the first time.

Coco Gauff’s fast start to the year came to an end at the Australian Open as she fell to a 7-5, 6-4 quarterfinal defeat against Paula Badosa.

In her last Grand Slam quarterfinal, the Spaniard imploded in New York. She is taking the lessons into her match with Gauff in Melbourne.

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.

Coco Gauff has lost in the Australian Open quarterfinals to Paula Badosa 7-5, 6-4 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 world No. 3 missed the chance to return to the semifinal stage after an inspired performance from the former world No. 2

Coco Gauff of the U.S. reacts during her quarterfinal match against Paula Badosa of Spain during their quarterfinal match at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Jan.