Alexander Zverev faces Karen Khachanov at US Open
Alexander Zverev holds the model edge over Karen Khachanov in a US Open semifinal shaped by serve and return pressure.
Serve versus return sets the frame
73% is the model's chance for Alexander Zverev, and it reflects a clear edge before a ball is struck. The US Open semifinal puts two powerful right-handers on hard courts, where short return games can alter an entire set. Serve holds will matter. Zverev enters as No. 3, while the gap to Khachanov in the rankings is substantial enough to shape expectations without deciding the tennis.
This is a best-of-five match, so the returner who stays engaged after missed chances may gain the larger reward later. Both men can use their first ball to dictate, but neither should expect many loose service games from the other. The pressure comes in small bursts. A deep return that reaches the server's feet can force a defensive second shot, and that is often where a baseline exchange changes direction.
Zverev's task is to protect his service rhythm while making Khachanov play from uncomfortable positions on return. He has played five matches in the last 14 days, so there is no question of entering this semifinal cold. Khachanov has the same recent workload. That makes this less about freshness and more about who can sustain clean serving patterns while continuing to attack the other player's second delivery.
Model win probability
Article snapshot, Sep 10, 2026 · Not live
The Court Shark model's chance for each player to win this match.
| Player | Win probability | Recent form (last 10) |
|---|---|---|
| Alexander Zverev | 73% | 7-3 |
| Karen Khachanov | 27% | 6-4 |
Zverev has the broader matchup edge
Zverev leads the head-to-head 5-3, including a 4-3 advantage on hard courts. Those margins are narrow enough to keep Khachanov firmly involved, yet they show that Zverev has repeatedly found workable patterns in this pairing. The rivalry has carried into meaningful tournaments. Neither player is walking into unfamiliar conditions or an unfamiliar style.
Their latest meeting came at the Cincinnati Masters in 2025, where Zverev won after Khachanov retired. That result does not offer a full match template for Friday, because an unfinished contest cannot settle questions about endurance or late-set serving. Still, it adds to Zverev's overall lead. The useful takeaway is that Khachanov has seen this matchup recently and knows the pace he must handle.
Return position could separate them. Khachanov needs to make enough balls early in Zverev's service games to prevent a run of quick holds, because those games can leave little room for recovery. Zverev needs the opposite. He wants Khachanov reaching for returns, then defending the next ball from behind the baseline. That sequence is simple, but it becomes harder to maintain across a long semifinal when each player is protecting a powerful serve.
Similar form raises the value of small moments
Zverev has won 7 of his last 10 matches, matching his record across his latest hard-court sample. Khachanov arrives at 6-4 over both measures. The contrast is real, though it is not overwhelming. Both players are also on a five-match winning run, which gives this semifinal a different feel from a contest between one player in form and one searching for answers.
Khachanov's route remains clear. He must make Zverev earn service holds through extended return games, then take his own first serve seriously enough to avoid giving away short looks. There is little margin. A returner who gets passive against either man can spend a set watching the score move too quickly, especially if the server finds length and direction with the opening ball.
Both players last competed one day ago, and both are listed as fresh for this match. That removes an obvious physical distinction before the start. The longer format still matters because momentum can move between sets. If Khachanov can make Zverev serve under pressure early, the ranking gap matters less. If Zverev is holding comfortably and landing returns deep, Khachanov may need a sharp change in pace or placement to create openings.
What the model says
The model gives Zverev a 73% chance and Khachanov a 27% chance. The market consensus has Zverev at 80% and Khachanov at 20%, making the outside view more confident in the favorite than the model is. The market moved toward Zverev from 79%. That is a small confirming move rather than a major reassessment of the semifinal.
The seven-point gap is the central distinction between the two views. Court Shark still sees Zverev as the likelier winner, supported by his ranking, stronger recent record, and head-to-head edge. But Khachanov's hard-court record against him is close enough to argue against treating the match as routine. His serve gives him a direct way to keep sets level and make the return games carry extra weight.
The call would change if Khachanov consistently turned Zverev's service games into extended exchanges while protecting his own first-serve advantage. That is the tennis issue beneath the probability. Zverev has the better overall position, but the match can tighten quickly if Khachanov denies him easy holds and forces him to hit repeated passing shots from defensive court positions.
Explore this matchup
Compare both players side by side: recent results, head-to-head and the model.
Player comparison
Article snapshot, Sep 10, 2026 · Not live
Each measure on the same scale: recent wins, wins on this surface, head-to-head wins and the model's chance.
| Measure | Alexander Zverev | Karen Khachanov |
|---|---|---|
| Wins, last 10 matches | 70% (7-3) | 60% (6-4) |
| Wins, last 10 on hard | 70% (7-3) | 60% (6-4) |
| Head-to-head wins | 63% (5-3) | 38% (3-5) |
| Model win probability | 73% | 27% |
Head-to-head by surface
Article snapshot, Sep 10, 2026 · Not live
Alexander Zverev and Karen Khachanov have met 8 times. Alexander Zverev leads 5-3.
| Surface | Alexander Zverev | Karen Khachanov |
|---|---|---|
| All surfaces | 5 | 3 |
| Hard | 4 | 3 |
Model and market on Alexander Zverev
Article snapshot, Sep 10, 2026 · Not live
Alexander Zverev's chance as the market consensus priced it from the opening line, next to the Court Shark model.
| Reading | Alexander Zverev | Karen Khachanov |
|---|---|---|
| Opening consensus | 79% | 21% |
| Latest consensus | 80% | 20% |
| Court Shark model | 73% | 27% |
Court Shark win probabilities are statistical estimates, not advice. No outcome is guaranteed.
Methodology and sources
How we build model estimates and where our information comes from.
Model estimates and observed results
The win probabilities come from the Court Shark match model, trained on completed ATP and WTA matches. A probability says how often a player in this position wins, not that one result will happen. The model's number for a match is recorded before play and never changed afterwards, so it can be checked against the result.
Sources and citations
Results, scores, rankings and serve statistics come from the Court Shark match database. The market consensus is the pre-match price for each player converted to a probability. Figures in this article are a snapshot taken when it was written.
Limitations
Serve and return rates count only matches with full serve statistics, which are sparser for Challenger and lower-level events, and the tour average they are compared with covers every year on record. Head-to-head records count every meeting with a recorded winner, walkovers and retirements included. Charts and tables are a snapshot and do not update after publication.
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