Kyrgios explains why he spat on a fan at Wimbledon 0:31
(CNN) --
Nick Kyrgios was frustrated by the smell of marijuana coming from the stands in his second-round victory at the US Open on Wednesday.
The Australian, who beat Frenchman Benjamin Bonzi 7-6 (7-3), 6-4, 4-6, 6-4, made his voice heard during the match, even when he complained to the chair umpire about the smell emanating from the stands of the Louis Armstrong Arena.
"People don't know that I'm very asthmatic, so when I'm running around and struggling to breathe, it's probably not something I want to breathe between points," he told reporters after the game.
The referee reminded fans to refrain from smoking on the court when play resumed.
Serena Williams beats World No.2 Anett Kontaveit to advance to US Open third round
The US Open crowd is known for being boisterous and the 27-year-old agreed that the Grand Slam has a very different "vibe" than other tournaments.
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CNN has contacted the US Open regarding Kyrgios' complaints about the smell of marijuana.
This comes just over a week after the woman Kyrgios accused of having "700 drinks" and being "totally drunk" during this year's Wimbledon final said she is suing the Australian tennis player for defamation.
Kyrgios was typically animated on the New York court, muttering to himself and berating his box between points.
The referee booked him for insulting someone on his team for not supporting him enough.
While his on-court antics were in full swing, so was his tennis.
Kyrgios was tested by his talented opponent, but he displayed the devastating power and newfound mental toughness that enabled him to reach his first Grand Slam final at Wimbledon in July.
He will now face American JJ Wolf in the next round but says his own good form is putting more pressure on him than usual.
"It's very stressful now because in every match I play I expect to play as well," Kyrgios told reporters.
"Such a clean performance is unrealistic in a sport like this where you play day to day. I probably have to lower the expectation of playing like it's a Wimbledon final every time. There are a lot of capable players who can play," Kyrgios added. .
Nick Kyrgios US Open
