Emma Navarro rallied from a 5-1 second-set deficit for a 6-2, 7-5 win over Spain’s Paula Badosa in the US Open quarterfinal round on Tuesday.

Navarro advances to Thursday’s semifinal round, the deepest run the 13th-seeded American has ever made in a Grand Slam tournament. There, she’ll face the winner between No. 7 seed Zheng Qinwen (China) and No. 2 seed Aryna Sabalenka (Belarus).

Navarro took early control of the match, breaking Badosa on the first serve of the opening set. She then broke Badosa again to win the set, 6-2.

The match appeared destined for a third set after Badosa took early control in the second. Badosa broke Navarro’s first serve of the set then broke her again en route to a 5-1 lead. But with the New York crowd firmly behind Navarro at Arthur Ashe Stadium, Navarro dominated the rest of the match.

She broke Badosa to cut her deficit to 5-3 en route to winning the last six games of the match, stunning the Spaniard to end her run at the US Open. Navarro won 24 of the last 28 points to secure the win.

Navarro said after the match that she maintained her confidence even after digging a 5-1 second-set hole.

Navarro is now two wins away from a US Open title after being eliminated in the first round in each of the previous two years. Tuesday’s was her second consecutive win over a seeded player after she upset reigning US Open champion and No. 3 seed American Coco Gauff in fourth-round play on Sunday.

Navarro is the first of four Americans hoping to advance to the semifinal round. Two US men will also be in action on Tuesday. No. 12 seed Taylor Fritz is facing No. 4 seed Alexander Zverev (Germany) on Tuesday afternoon. No. 20 seed Frances Tiafoe is scheduled to face No. 9 seed Grigor Dimitrov (Bulgaria) in prime time.

On Wednesday, No. 6 seed Jessica Pegula will face No. 1 seed and 2022 US Open champion Iga Świątek (Poland).