INDIAN WELLS, CA, USA – Zhang Shuai came out on top after being a set and 4-2 down against No.20 seed Caroline Wozniacki, winning a marathon three-hour-and-twenty-four minute match to advance to the third round at the BNP Paribas Open.

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The surging Zhang, who ended last season ranked No.186 and has risen over 100 spots since, announced her presence to the tennis world at one of its biggest stages when she defeated the then-World-No.2 Simona Halep at the Australian Open on her way to the quarterfinals. She’s been skyrocketing since and owns a 15-2 win-loss record across all levels this year.

Coming out against the heavy favorite and 2011 champion Wozniacki, Zhang knew she’d have to come up with the best tennis of her career to get the upset, and that seemed like a tall order after the Dane calmly grabbed the first set 6-4.

The players traded five consecutive breaks of serve to start out what would become a rollercoaster second set. Wozniacki finally held first, getting a 4-2 lead and looking for all intents and purposes like she would eventually close out the match in straight sets. But Zhang, who was making every game into a battle, had other ideas. She broke once again and sent the set into a tiebreaker. They stayed toe-to-toe until Wozniacki finally blinked, Zhang converting her seventh set point to close out the hour-and-twenty-seven-minute-long game.

Wozniacki grabbed another big lead in the third set, breaking twice to get ahead 4-1 and get within striking distance of the third round. So long and late into the night, the crowd at Stadium 4 played their own part in the match, an enthusiastically vocal Chinese contingent chanting against Wozniacki’s loud legion of supporters. They powered Zhang to get herself back in it, though, as clawed her way back game by game until she hit her first ace to level the match at 4-4.

The Danish player just wouldn’t let go, hitting her first ace in reply to grab the next game. But even three hours into the match, Zhang was still able to find another gear. Despite Wozniacki saving three match points, Zhang emerged victorious in the marathon match, winning 4-6, 7-6(8), 7-5.

“So excited, so tough match,” Zhang said after the match. “Any time everybody play against her, always tough to win because she’s very strong mentally and very good at defense.

“She was a big challenge to me because I was not really aggressive, not really stronger. But I have to be stronger if I want to win.”

Next up for Zhang is Victoria Azarenka, who dropped just five games against Zarina Diyas on her way to the third round, 6-3, 6-2.