Nick Kyrgios upsets defending US Open champ Daniil Medvedev to advance to quarterfinals

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Unsure of the relevant rule, Nick Kyrgios lost a point by running around the net to hit a ball that was going to land way out. He yelled at his guest box. He argued with the chair umpire. 

Most importantly, and has happened more recently for him than ever, Kyrgios won, eliminating defending U.S. Open champion and No. 1-ranked Daniil Medvevev.

Building on the momentum he built by reaching the Wimbledon final, Kyrgios moved into the quarterfinals at Flushing Meadows for the first time by beating Medvedev 7-6 (11), 3-6, 6-3, 6-2 on Sunday night.

Nick Kyrgios of Australia reacts against Daniil Medvedev during their Men's Singles Fourth Round match on Day Seven of the 2022 US Open at USTA Billie Jean King National Tennis Center on September 04, 2022, in the Flushing neighborhood of the Queens borough of New York City. (Sarah Stier/Getty Images)

The 23rd-seeded Kyrgios, a 27-year-old from Australia, never had managed to make it past the third round of the U.S. Open until now, going 0-4 at that stage until this year. But Kyrgios also never has managed to parlay his unquestioned skill into terrific play or any semblance of consistency the way is doing lately.

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"I'm just glad I'm finally able to show New York my talent," he said. "I haven't had too many great trips here."

He reached his first Grand Slam semifinal, then first Grand Slam final, at the All England Club in July, before losing to Novak Djokovic in the title match. Then Kyrgios won his first ATP title in three years at Washington in August. He followed that up with a victory over Medvedev at a