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 yr 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 seemed 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 fought off these three set factors however Fritz ultimately broke by way of on the fifth try.
Zverev will really feel he had his moments however Fritz received by with the ability to neutralise Zverev’s booming first serve and stay the extra strong with the end line in sight.
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 consequence.
Zverev, looking for a 3rd US Open semi-final and his first Grand Slam title, was unusually flat within the closing set and complained all through about his racquet.
“I do know the group would actually need to see me play Frances so we get an American within the closing,” Fritz added.
“That might be loopy, so I assume we’ll see what occurs – however both manner I will be able to go.”
Britain’s Jack Draper is amongst these remaining within the high half of the draw. He performs Alex de Minaur within the quarter-final on Wednesday.