Rising Chinese teenager Zheng Qinwen reached the first WTA 1000 quarterfinal of her career by ending local favorite Bianca Andreescu's eight-match winning streak 7-5, 5-7, 6-2 at the Canadian Open on Thursday.

The first two sets saw intense exchanges between the pair before 19-year-old Zheng crushed the former U.S. Open champion Andreescu in the decider.

"The victory meant a lot to me," said Zheng, "it boosted my confidence because I could still win even though I was not in my best form."

Zheng is only the second Chinese after tennis icon Li Na to achieve the feat. Li reached the last eight at the U.S. Open tune-up event in 2013.

"Actually, I didn't know that she made it here before. It feels magical," Zheng said. " I wish I could play better and show my best tomorrow."

The Chinese sensation, who started the season ranked No. 143 but has rocketed to No. 51, will next face Karolina Pliskova in the quarterfinals in their first meeting.

In other games, Polish world No.1 Iga Swiatek was stunned by Brazil's Beatriz Haddad Maia in a 6-4 3-6 7-5 defeat, while Jessica Pegula beat holder Camila Giorgi to join Coco Gauff and Simona Halep in the quarterfinals.

Tenth seed Gauff beat sixth seed Aryna Sabalenka 7-5 4-6 7-6(4) a day after ousting Wimbledon champion Elena Rybakina in a third-set tiebreak to set up a clash with 15th seed Halep, a 6-2 7-5 winner over Jil Teichmann.

And Haddad Maia will play Spanish eighth seed Garbine Muguruza.

In the women's doubles, China's Zhang Shuai and partner Australian Storm Sanders lost to Nicole Melichar‑Martinez/Ellen Perez 6-4, 6-4 in the quarterfinals.

In the men's event, Australian Nick Kyrgios produced another extraordinary performance to demolish compatriot Alex de Minaur 6-2, 6-3 at the Canadian Masters on Thursday, a day after stunning world No. 1 Daniil Medvedev.

Fiery Wimbledon finalist Kyrgios has been playing the best tennis of his career and is showing no signs of slowing down in Montreal, where he won the first four games of the opening set in which de Minaur won scarcely more than half of his first-serve points.

He will next face Poland's Hubert Hurkacz in the quarterfinals. 

The win will also move the 27-year-old Kyrgios high enough in the rankings to be seeded at the U.S. Open later this month. 

Kyrgios has won 15 of his last 16 matches and a day earlier produced a serve-and-volley masterclass to stun Medvedev 6-7(2), 6-4, 6-2.

In other matches, Felix Auger-Aliassime harnessed his mighty serve to down Briton Cameron Norrie 6-3, 6-4 to delight his home crowd, while Norwegian Casper Ruud outlasted Roberto Bautista Agut in a closely fought three sets.

(With input from agencies)