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Coco Gauff beats Sloane Stephens to reach first major semifinal (0:27)

Coco Gauff is through to her first major singles semifinal after a win over Sloane Stephens. (0:27)

11:18 AM ET

Cori andCoco Gauff advanced to the semifinals of a Grand Slam tournament for the first time with a victory over former US Open champion.

Gauff built early leads in both sets.

The 18th-seeded Gauff led 3-1 in the second set when the fourth-seeded Stephens missed an opportunity to get back on serve, sending a drive volley long on her third break-point chance before Gauff won the next two points.

Gauff won the next seven points and broke the first set at 5-5. Gauff got her first set-point opportunity after Stephens missed a backhand volley.

The 29-year-old was runner-up at the French Open the year after she won the US Open.

Gauff has not dropped a set on her way to the semifinals.

The 18-year-old Gauff will face another first-time semifinalist in the form of the 21-year-old Trevisan.

She advanced to her first Grand Slam semifinal by beating a hobbled Fernandez.

The Italian had a chance to win in two sets against the 17th-seeded Canadian at Court Philippe Chatrier, but he lost the first set and the tiebreak.

The first seven points of the third set were won by Trevisan, who broke twice and went on to win the set.

The 19-year-old, who reached the US Open final in September, received treatment on her right foot in the first set. She had her foot taped during a timeout after the fifth game.

It is the 10th straight win for the 59th-ranked Trevisan, who reached the French Open quarterfinals two years ago. She won her first tour title this month.

The report was contributed to by the Associated Press.