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.

The world No. 3 missed the chance to return to the semifinal stage after an inspired performance from the former world No. 2

Spain’s Paula Badosa stunned Gauff and grabbed a 7-5, 6-4 win in straight sets in what was a hot battle at Rod Laver Arena on Tuesday afternoon to earn her spot in the semifinals of the first Grand Slam of the year. It marked Badosa’s first-ever win over a top-10 opponent in a Grand Slam, and moved her to ninth in the world.