No.6 seed Coco Gauff came from a set down to overcome qualifier Mirra Andreeva 6-7(5), 6-1, 6-1 in 2 hours and 3 minutes to reach the Roland Garros fourth round.

Gauff will next face the unseeded Anna Karolina Schmiedlova, who booked her place in the second week of a Grand Slam for the first time with a 6-1, 6-3 win over qualifier Kayla Day.

A matchup between the two youngest players left in the draw saw last year's finalist Gauff advance to the second week of a major for the eighth time and for a third straight year in Paris. The result marks the first time the 19-year-old has won three matches in a row since reaching the Indian Wells quarterfinals in March.

French Open: Scores | Order of play | Draw

Andreeva, 16, leaves her first Grand Slam tournament by extending her 2023 record to 22-3 and taking her first set from a Top 10 player. Having been ranked No.312 at the start of April, she will rise from her current No.143 to a position on the edge of the Top 100 and possibly even inside it depending on other players' results next week.

Turning points: An absorbing opening set saw both players probe each other's games with tactical shifts and competitive grit. There were two key momentum swings across the 65-minute first act.

Andreeva was more controlled in the early stages, testing the Gauff forehand while nailing a series of precise backhand drives and drop shots. She broke the American twice and served at 4-2, 40-15 -- only to double fault. Gauff seized the opportunity to get back into the match, conjuring up a pair of superb drop shots herself as she reeled off three straight games.

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Serving for the set at 5-4, 30-0, Gauff sent a forehand long -- and this time, it was Andreeva who pounced on the opening. Her own forehand had gone awry as her lead had slipped, but she began to rally with more freedom as she edged the set in the tiebreak.

The final point encapsulated Andreeva's boldness. Gauff had saved two set points, and a frustrated Andreeva had received a code violation after hitting a ball into the crowd. She responded with a second serve on the line and a drive volley winner.

But Gauff's experience showed as she wiped the slate clean and began to assert her authority. The American's second serve had been a weakness in the first set. She had won just four points out of 14 behind it and committed five double faults. In the second and third sets, it was transformed. She won 12 out of 14 points behind her second delivery, and indeed only conceded five points on serve in the last two sets combined.

Andreeva was unable to live with Gauff's raised level, finding it harder to hit through her opponent's athleticism to end points. Across the last two sets, she hit just eight winners to 23 unforced errors.

The third game of the deciding set was Andreeva's last stand, a three-deuce tussle that saw both players go toe-to-toe with superb all-court tennis. But Andreeva was unable to take two game points and double-faulted facing a second break point.

From there, Gauff rolled to the finish line with increasingly brilliant shot-making. A jumping backhand overhead in the final game drew gasps from the Court Suzanne-Lenglen crowd, and she converted her first match point with a fizzing backhand winner, her 35th of the day.

Gauff on the role experience may -- or may not -- have played: "I don't know, to be honest. When I played against her, I didn't feel like she was lacking experience. Honestly, at the end of the first set it was weird. I don't know if it was the energy she was giving off or anything, wasn't really quite anything she did, but I had a feeling that, even though I lost that set, I felt like I won the set.

"I knew in my head that I was playing the right way. I mean, 5-4 serving for it, 30-0 and she played great in the tiebreaker. I think I had two loose points and that matters in the tiebreaker.

"I can say probably experience played a factor, but honestly what it felt like on the court, it didn't feel like [it]. You know, I played two other people that were younger than me, and in one of those matches for sure I would say experience played a part, but I don't know if that meant today. I think she plays beyond her years, and I don't know, feels similar to how I was." 

Schmiedlova scores career milestone: Schmiedlova is currently ranked No.100, but the 28-year-old is a three-time Hologic WTA Tour titlist and has been as high as No.26. The second week of a major has been missing from her résumé, though -- until this week, in her 33rd Grand Slam main-draw appearance, when Schmiedlova has notched that milestone in style.

The Slovak has yet to drop a set, and has conceded only 15 games in three matches. In her 1-hour, 20-minute defeat of Day, she struck 18 winners to the American's nine, with her ability to find sharp angles and change direction on her backhand wing proving crucial.

Schmiedlova's run has turned around a season in which she had only won two tour-level matches before Roland Garros. This week marks the first time she has won three consecutive tour-level matches since her run to the 2019 Hobart final.

Schmiedlova is the first player from Slovakia to reach a Grand Slam second week since Magdalena Rybarikova made the 2018 Australian Open fourth round, and the first to do so in Paris since Dominika Cibulkova's 2012 quarterfinal run.