LUXEMBOURG - Hong Kong champion Dayana Yastremska continued her rapid rise at the BGL BNP Paribas Luxembourg Open, scoring the first Top 20 victory of her career against Garbiñe Muguruza.

Last week at the Prudential Hong Kong Tennis Open, 18-year-old Yastremska turned heads when she became the second-youngest player to win a WTA title this year - and she did it without dropping a set en route to her maiden WTA trophy.

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Yastremska backed it up in impressive style against World No.13 Muguruza, needing an hour and nine minutes to record the 6-2, 6-3 victory - the best win-by-ranking of her career - and move into the Luxembourg quarterfinals.

“I was very tired after Hong Kong, I have pain everywhere,” Yastremska admitted later. “Yesterday during the match I felt very dizzy because I played very late. I just found some way to get over it and kept fighting.

“Today I prepared myself to win, but somewhere deep I knew that I wouldn’t be able to show my best game. But somehow, I just played.”

Muguruza struggled to find her world-beating form against the Ukrainian teenager - in her previous match, she put on a service masterclass against Stefanie Voegele but against Yastremska she found her serve constantly under attack.

The Spaniard’s first two service games were certainly a sign of things to come - Muguruza was pushed to deuce both times, but managed to wrangle holds to keep pace with Yastremska. But the Ukrainian finally broke through in commanding style, reeling off the last four games in a row to close out the set.  

Yastremska was firing on all cylinders, and her all-out attack smothered Muguruza’s game - she fired 11 winners against just 3 from Muguruza in set one. And she kept up the relentless pace in the second set as well. Yastremska’s storm of winners helped her open up a 2-0 lead with an early break, but found herself with a fight on hands as Muguruza broke straight back.

After a string of four consecutive breaks of serve left them level at 3-3, Yastremska dialled up the aggression to stay in front, breaking at 5-3 and calmly served out the match to book her spot in the quarterfinals.

“My face was in shock when I won,” Yastremska laughed. “But it was not shock that I won the match, it was shock that I won against Muguruza. I beat a top player who has two Grand Slams, I didn’t expect that it would be this score. It was a really tough match.”

Awaiting in the next round is the resurgent Margarita Gasparyan, who eased past Dalila Jakupovic 6-4, 6-0 earlier in the day.