This has proved to be Fritz’s breakthrough second in his thirty third Grand Slam look.
He misplaced to Novak Djokovic within the US Open quarter-finals in 2023, twice misplaced within the final eight at Wimbledon in 2022 and July this 12 months and suffered defeat within the Australian Open quarters in January.
After sharing two tight units, the essential second got here deep within the third when Zverev appeared to have the momentum, having recovered an early break.
He missed a simple backhand on break level at 4-4 which allowed Fritz to carry after which the fourth seed supplied up three forehand errors to fall 0-40 behind.
Zverev held off these three set factors however Fritz finally broke via on the fifth try.
Fritz, who additionally beat Zverev from two units down at Wimbledon this 12 months, was in a position to neutralise the German’s booming first serve and stay the extra stable with the end line in sight whereas hitting highly effective serves of his personal.
He gained the initiative within the fourth-set tie-break by taking the primary level on the Zverev serve and received a gruelling 24-point rally for the second break and a 5-2 lead.
Fritz faltered momentarily, pushing a nervous forehand broad, however Zverev supplied up two extra errors to seal the end result.
Zverev stated afterwards it was probably the most indignant and dissatisfied he had felt after a match in a “very long time”.
“I performed horrible,” stated Zverev, who was unusually flat within the ultimate set and complained about his racquet all through as he chased a primary Grand Slam title and a 3rd US Open semi-final.
“I simply don’t have any solutions proper now. He performed fairly a superb match. I did nothing to should win.”
On the prospect of an all-American semi-final in opposition to Tiafoe, Fritz stated: “I do know the gang would actually wish to see me play Frances so we get an American within the ultimate.
“That might be loopy, so I suppose we’ll see what occurs – however both approach I will be able to go.”
Britain’s Jack Draper is amongst these remaining within the prime half of the draw. He performs Alex de Minaur within the quarter-final on Wednesday.
