Stian Klaassen vs William ZhangPrediction, Head-to-Head Results, and Stats
Stian Klaassen and William Zhang have met 1 time since 2026; Stian Klaassen leads 1–0. Across all meetings Klaassen has taken 2 sets to Zhang's 0. Their most recent meeting: Stian Klaassen won at M15 Rancho Santa Fe (2026).
Spread & Straight-Sets Form
Completed best-of-3 matches · Last 12 months
| Indicator | Klaassen | Zhang | ||
|---|---|---|---|---|
| Indicator | Stian Klaassen | William Zhang | ||
| Wins in straight sets | 89% | 8/9 | — | |
| Wins a set when losing | 38% | 3/8 | 30% | 3/10 |
| Goes to a deciding set | 24% | 4/17 | 30% | 3/10 |
| Covers −1.5 sets as favorite | 63% | 5/8 | 0% | 0/1 |
| Covers +1.5 sets as underdog | 71% | 5/7 | 25% | 1/4 |
| Tiebreak sets won | 50% | 1/2 | — | |
| Wins after taking set 1 | 82% | 9/11 | — | |
| Wins 2-0 after taking set 1 | 73% | 8/11 | — | |
Colored rows are higher-is-better: green above 50%, red below. Favorite/underdog set by book odds; cover rows count only matches with odds on record. Head-to-head: 1 of 1 completed meetings ended in straight sets (Klaassen 1, Zhang 0).
Previous meetings
1 career meeting, newest first
Jul 8, 2026
M15 Rancho Santa Fe
H Hard · 1st Round
Player ROI
Hypothetical if you put 1u on each player to win every one of their matches · Last 90 days
| Metric | Klaassen | Zhang |
|---|---|---|
| W-L | 3–4 | - |
| Avg odds | 1.71 | - |
| ROI % | -37.7% | - |
| Units P/L | -2.64u | - |
Small sample: ROI stabilizes with more matches; fewer than 10 in the window is noisy.
Common opponents
Results vs. opponents both players faced · Last 12 months
Across 2 shared opponents, both Klaassen and Zhang posted a 50% win rate.
| Opponent | Klaassen | Zhang |
|---|---|---|
| Bjorn Schoemacher | W 60 61 | W 64 75 |
| Vignesh Gogineni | L 62 36 26 | L 36 26 |
Recent Form
Last five matches per player
Emilien Demanet
M25 Oldenzaal · 2nd Round
Aug 27
Gray Voelzke
M25 Oldenzaal · 1st Round
Aug 26
Noah Schlagenhauf
M15 Lambermont · 1st Round
Aug 19
Arvid Nordquist
M15 Turku · 1st Round
Aug 11
Benoit Torcq
M15 Eupen · 2nd Round
Aug 6
Marlon Vankan
M15 Eupen · 1st Round
Aug 5
Bjorn Schoemacher
M15 Eupen · 3rd Round Qualifying
Aug 4
Christopher Patzanovsky
M15 Eupen · 2nd Round Qualifying
Aug 3
Stian Klaassen
M15 Rancho Santa Fe · 1st Round
Jul 8
Tae-Woo Lee
M15 Rancho Santa Fe · 3rd Round Qualifying
Jul 7
Jesus Martinez
M15 Rancho Santa Fe · 1st Round Qualifying
Jul 6
Vignesh Gogineni
M15 San Diego · 1st Round
Jul 1
Nav Dayal
M15 San Diego · 3rd Round Qualifying
Jun 30
Marco Alvarez
M15 San Diego · 1st Round Qualifying
Jun 29
Gus Grumet
M15 Claremont · 3rd Round Qualifying
Jun 23
Peter Jorniak
M15 Claremont · 1st Round Qualifying
Jun 22
Win rate
Matches, sets and games won · Last 12 months · 10–17 matches
| Metric | Klaassen | Zhang |
|---|---|---|
| Matches won | 53% | 0% |
| Sets won | 55% | 13% |
| Games won | 52% | 37% |
Record by tier
Head-to-head record by tournament tier
| Stage | Klaassen | Zhang |
|---|---|---|
| ITF M15 | 1 | 0 |
By surface
Head-to-head record per surface
| Surface | Klaassen | Zhang |
|---|---|---|
| Hard | 1 | 0 |
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