Zverev & Khachanov Quarterfinal Predictions, H2H

The Five-Hour Deficit: Zverev’s Efficiency Against Van De Zandschulp’s Fatigue

Alexander Zverev enters this quarterfinal as the top seed, boasting a highly efficient path through the draw. With Jannik Sinner sidelined due to injury, the German has a massive opportunity to dictate the top half of the draw. In his previous round, Zverev expended minimal energy, wrapping up his match in just three straightforward sets. This efficiency is critical when analyzing his upcoming opponent, Botic Van De Zandschulp, who is coming off a grueling, five-hour marathon that pushed his physical limits to the absolute edge.

From a technical standpoint, Zverev will look to exploit this recovery gap by establishing early dominance with his first-serve percentage. On the fast hardcourts of Queens, Zverev’s ability to win cheap points on serve will force the fatigued Dutchman into long, defensive lateral movements. Van De Zandschulp’s return positioning must be exceptionally deep to neutralize the serve, but doing so against a well-rested opponent leaves him vulnerable to short-angle drop shots and aggressive transition play. We previously analyzed Zverev's recent history on these courts, highlighting how his serve-plus-one efficiency remains his primary weapon.

The Physical Toll: Blockx’s Medical Timeout Meets Khachanov’s Hardcourt Attrition

On the other side of the draw, 21-year-old Alexander Blockx faces a daunting physical challenge against the experienced Karen Khachanov. Blockx’s run has been impressive, but his Round of 16 victory over Francisco Cerundolo exposed significant physical vulnerabilities. The young Belgian felt visibly unwell during the match, requiring medication on court to stabilize his condition. Facing an aggressive baseliner of Khachanov’s caliber requires absolute physical peak performance, especially given the high humidity and heavy air conditions of the late-summer afternoon sessions.

Khachanov will undoubtedly test Blockx's lung capacity and lateral movement from the very first ball. The Russian’s heavy topspin forehand is designed to push opponents behind the baseline, forcing them to defend from uncomfortable heights. If Blockx is still feeling the lingering effects of his illness, his footwork will degrade, leading to mistimed shots and short balls that Khachanov will easily punish. According to the official ATP rankings, Blockx sits at No. 34, but his lack of deep major experience could prove costly if this match extends past the three-hour mark.

Rivalry Matchup & Player Profiles

This quarterfinal clash represents a crucial test for both competitors. Khachanov leads their head-to-head record 1-0, with their sole prior encounter being cut short when Blockx was forced to retire in the third set due to a debilitating rib injury. That match demonstrated how Khachanov's relentless depth can break down an opponent's physical frame over time. For Blockx to reverse this trend, he must shorten the points, utilize aggressive first-strike tennis, and avoid getting locked into grueling crosscourt forehand exchanges.

Below is a comprehensive look at the physical and career metrics of both players heading into this high-stakes encounter on the hardcourts of Flushing Meadows.

This matchup will ultimately be decided by physical resilience. If Blockx has fully recovered from his Round of 16 illness, his clean ball-striking can trouble Khachanov. However, the Russian's proven track record over five sets and his superior physical durability make him the heavy favorite to advance. You can track live updates and schedules directly on the Flushing Meadows tournament homepage.