A fan was kicked out of Arthur Ashe Stadium in the early hours of Tuesday morning after Alexander Zverev claimed the man said “the most famous Hitler phrase there is.”

While the German star emerged victorious after beating Jannik Sinner in five sets to land himself a spot in the quarter-final, the match wasn’t without controversy.

As the pair were locked 2-2 in the fourth set, Zverev couldn’t take it anymore and stormed over to the chair umpire to complain about the fan’s shocking remark.

“It’s unacceptable,” Zverev, 26, told umpire James Keothavong, who instantly turned around to ask the fan to reveal themselves.

“Who said that? Who said that? We’re going to get him out,” Keothavong said, before making an announcement to the crowd urging them to respect the players.

After Zevrev’s report to the chair umpire, several security members came down in the stands to search for the fan for several minutes.

Play continued soon after, but just minutes later, cameras cut to the stands as a middle-aged man was spoken to by security.

They then escorted him out of the stadium while the crowd cheered and booed the fan as he walked up the steps toward the concourse.

After his five-set win — which took four hours and 41 minutes — the athlete spoke to the crowd about what happened.

“He started singing the anthem of Hitler that was back in the day,” he said. “It was ‘Deutschland über alles’ and it was a bit too much.”

“I think he was getting involved in the match for a long time, though,” the world No. 12 continued. “I don’t mind it, I love when fans are loud, I love when fans are emotional. But I think me being German and not really proud of that history, it’s not really a great thing to do and I think him sitting in one of the front rows, I think a lot of people heard it. So if I just don’t react, I think it’s bad from my side.”

“It’s his loss, to be honest, to not witness the final two sets of that match,” he added.

It continues a disturbing trend of fan behavior at Flushing Meadows.

Grand slam champ and ESPN analyst Rennae Stubbs said she was hit by a drink at the same match when a “drunk” woman was fighting with her boyfriend.

“There are some fans this late at night @usopen that are not good! I ❤️ the fans but at this point, there are some bad characters. I had a drink thrown on me last night by a drunk fan who was fighting with her boyfriend. Now we got someone yelling Hitler slurs! Wtf? Come on peeps,” Stubbs wrote on X.

Fans and players have complained about the rowdiness of attendees throughout the two-week event.

“You can’t control 22,000 people. Seventy percent of the fans are just loaded and just absolutely drunk. You can tell them ‘hush’ as you want,” American Frances Tiafoe, who plays Ben Shelton in the quarterfinals on Tuesday, told Time magazine.

“There is just no place for xenophobia or any form of discrimination in Tennis,” another wrote.

A third added, “Disgusting look for New York and America if that patron did actually make some sort of Hitler slur towards Zverev. #USOpen.”

Following the match, US Tennis Association spokesman Chris Widmaier confirmed that a “disparaging remark was directed toward Alexander Zverev.”

Zverev will face off defending US Open champion Carlos Alcaraz on Wednesday.

Alcaraz’s US Open appearance follows hot on the heels of his historic Wimbledon win.

With Post wires