NEW YORK -- As he watched one last errant forehand from his No. 4-ranked US Open opponent land wide, Taylor Fritz dropped his neon-colored racket, clenched both fists and screamed, "Come on!"
Fritz gathered himself and his equipment, walked to the net for a hug with Alexander Zverev, who twice was a Grand Slam runner-up, then stepped to the center of Arthur Ashe Stadium, spread his arms wide and yelled again, "Come on!"
After years of climbing the rankings, of becoming the top American man in tennis, of coming close to making a breakthrough at one of his sport's four most important events, Fritz finally came through at home, beating Zverev 7-6 (2), 3-6, 6-4, 7-6 (3) on Tuesday at Flushing Meadows to reach a major semifinals for the first time.
It was the 12th-seeded Fritz's fourth win over an ATP top-10 player in a major this season, the most by an American man in one year since Andre Agassi won five in 1999. Before this season, Fritz was 0-11 in majors against the ATP top 10.
Fritz, a 26-year-old from California, entered the day with an 0-4 record in Slam quarterfinals. Now he has joined Frances Tiafoe (2022 and 2024 US Open), Tommy Paul (2023 Australian Open) and Ben Shelton (2023 US Open) as the only active American men with major semifinals appearances.
"I've had a lot of looks at quarterfinals over the last couple of years, and today just felt different," Fritz told the crowd that supported him throughout the win. "I really felt like it was my time to take it a step further."
He will meet the 20th-seeded Tiafoe on Friday. Tiafoe advanced over No. 9 Grigor Dimitrov of Bulgaria when Dimitrov stopped playing because of an injury in the fourth set Tuesday night. Tiafoe was leading 6-3, 7-6 (5), 6-3, 4-1 when Dimitrov retired from the match.
"It's cool I'm in the semis. But I very much have the mindset of 'the job's not done,'" Fritz said. "A question I got asked pretty much every time I lost in my quarterfinals was, 'What's it going to take to go further?' And the answer I gave was always: 'Just keep putting myself in these situations, and I'll become more comfortable in these situations and get better.' That's definitely what happened now. The quarterfinals didn't feel like, I don't know, this big thing to me like it has been, I guess, in the past."
The Fritz-Tiafoe semifinals -- "That could be crazy," Fritz said before the matchup was decided -- is the first between a pair of American men at any major since 2005, when Agassi defeated Robby Ginepri in New York.
No American man has won a Grand Slam singles trophy since Andy Roddick triumphed at the US Open in 2003.
The other men's quarterfinals will be played Wednesday: No. 1 Jannik Sinner vs. No. 5 Daniil Medvedev, and No. 10 Alex de Minaur vs. No. 25 Jack Draper.
Fritz used his usual blend of big serving, winning 20 of 21 points when his first serves landed in during the fourth set, and big forehands, but he also was effective at the net -- winning 16 of 24 points when he pushed forward -- and returned well enough to accumulate 10 break points.
"There's still work to be done, but his transition game is getting better. The fact he's seeing it pay off, especially here at the US Open in some big points ... he's starting to buy into it and believe it," said Fritz's coach, Michael Russell, specifically mentioning a volley that won a 24-stroke exchange to make it 5-2 in the concluding tiebreaker. "It's good to see. That's a big step that we've been really emphasizing for him to win [at] these bigger stages. You can't just serve and be on the baseline."
Even though Fritz only converted two of those break chances, it meant he constantly put pressure on Zverev, a German who made it to the finals of the US Open in 2020 and the French Open this year.
"My backhand, I don't remember, since being on tour, hitting my backhand this badly. I just don't. I mean, I was missing shots which were in the middle of the court with no pace, and [they landed in the] bottom of the net. Terrible. Just absolutely terrible by me," Zverev said, shutting his eyes and shaking his head.
"My forehand was OK, actually. My serve was OK. But my most reliable shot, the shot that I'm most known for, the shot that you normally wake me up at 3 a.m. and I would not miss, was absolutely not there today," added Zverev, who also lost to Fritz at Wimbledon in July, "and I have no words for it, to be honest."
Zverev won 60% of his second serve points over the first two sets (12-of-20), but only 36% of those points over the final two sets (8-of-22).
He described himself as "angry."
Fritz's latest quarterfinals loss came at the All England Club against Lorenzo Musetti.
The other three? Two came against 24-time Slam champion Novak Djokovic; the other against 22-time Slam champion Rafael Nadal.
One was at last year's US Open against Djokovic, who went on to win the title. Djokovic was eliminated this time in the third round last week; Nadal sat out the tournament.
Russell said those past stumbles were not a topic of conversation before this quarterfinals.
"We would never talk about, 'Hey, you haven't been to the semifinals of a Slam before,' because you're not really breeding the positivity factor to it," Russell said. "It's more about, 'You've been in this position before and come out here and use your weapons that you have, and use the new weapons that we're trying to create, and just go out there and play your game, use the crowd, love the excitement and the actual competition and battle,' which he does, and just go feed off it."
ESPN Stats & Information and The Associated Press contributed to this report.