Things got heated in the second round of the men’s doubles at the Australian Open, which resulted in Nick Kyrgios and Thanasi Kokkinakis defeating the No. 1-seeded Nikola Mektic and Mate Pavic on Friday.

Before the 7-6(8) 6-3 loss, Pavic had a heated exchange with the umpire, pointing his finger in frustration.

“This is p—ing me off … don’t let that happen,” he said, per news.com.au.

The packed crowd was roaring about Australians Kyrgios and Kokkinakis stealing the lead after a tie-break in the first set — one man in the crowd stole the spotlight when he drank a beer from his shoe as fans cheered him on, according to the outlet.

Kyrgios was swaying back and forth on the other side of the court during the Pavic’s outburst, while commentators speculated why Pavic was irritated.

In a post match press conference, Pavic said the crowd wasn’t to blame for his actions — it was “something else,” which he did not disclose.

As for the crowd, Pavic said, “It wouldn’t hurt to show some respect.”

Pavic is not the first player to seem bothered by the crowd at a Kyrgios match this week. Daniil Medvedev had issues with the boisterous crowd during his win over Kyrgios in singles on Wednesday,

“It’s just a little disappointing when they are making so much noise between 1st and 2nd serve, I guess some people just have a low I.Q,” Medvedev, the No. 2 seed, said. “That’s how they are here. We used to that … but it wouldn’t hurt them to show some respect.”

Kyrgios, however, embraced the loud crowd.

“You’ve got the most entertaining player playing in his home slam on Rod Laver,” he said. “You’d expect the crowd to be like that. I can understand it’s a gentleman’s game, but it’s about time that people embraced some sort of different energy in this sport otherwise it will die out. It’s just that simple.”