Australian tennis star Nick Kyrgios may be fresh off his best performance at a tennis major – a finals appearance at Wimbledon – but his on-court antics are here to stay. 

Kyrgios, playing in the second round of the U.S. Open on Wednesday against Benjamin Bonzi of France, complained to the umpire of the smell of marijuana coming from the crowd and was issued a warning for swearing at someone in his box for not being supported enough during the match. 

Nick Kyrgios plays in the second round of the US Open

Nick Kyrgios reacts during his U.S. Open match against Benjamin Bonzi on Aug. 31, 2022, in New York City. (Julian Finney/Getty Images)

Kyrgios complained about the smell, and the chair umpire suggested that he could be smelling food. 

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"Obviously, I’m not going to complain about food smells," Kyrgios responded, according to USA Today. "Obviously, not."

The umpire did jump on the microphone to ask the crowd to "refrain yourselves from smoking on the court." 

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Kyrgios went on to win the match 7-6 (3), 6-4, 4-6, 6-4, telling reporters after the second-round win that he’s asthmatic. 

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"People don’t know. I’m a heavy asthmatic," Kyrgios said following the match. "So, when I’m running side to side and I’m struggling to breathe already, probably not something I want to be breathing in in between points."

Nick Kyrgios returns a ball at the 2022 US Open

Nick Kyrgios returns a ball against Benjamin Bonzi on Aug. 31, 2022, at USTA Billie Jean King National Tennis Center in the Queens borough of New York City. (Diego Souto/Quality Sport Images/Getty Images)

Kyrgios also pointed out the difference between the crowd at the U.S. Open compared to other majors, highlighting that Arthur Ashe Stadium was "noisy." 

"Yeah, the U.S. Open, it’s a very different vibe to everywhere else. I feel like Wimbledon was so proper. Australian Open, you kind of expect it there, being an Aussie. But here, it’s just like noisy. Point in, point out, I can’t barely hear. Half the time I can’t even hear my team because it’s just so noisy all the time.

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Nick Kyrgios plays in the second round of the US Open

Nick Kyrgios during his match against Benjamin Bonzi at the U.S. Open, Aug. 31, 2022.   (Tim Clayton/Corbis via Getty Images)

"For someone that’s struggled to focus in my career, I’m really trying hard to put my head down and play point by point and to try and dig myself out of some certain situations. It’s hard because there’s a lot of distractions. Obviously, there’s a lot of heckling going on as well. People are saying things and I got to be very careful with what I say these days."

Kyrgios will play American J.J. Wolf in the third round of the U.S. Open on Friday.