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 | 86% | 6/7 | — | |
| Wins a set when losing | 38% | 3/8 | 0% | 0/3 |
| Goes to a deciding set | 27% | 4/15 | 0% | 0/3 |
| Covers −1.5 sets as favorite | 63% | 5/8 | — | |
| Covers +1.5 sets as underdog | 67% | 4/6 | 0% | 0/3 |
| Tiebreak sets won | 50% | 1/2 | — | |
| Wins after taking set 1 | 78% | 7/9 | — | |
| Wins 2-0 after taking set 1 | 67% | 6/9 | — | |
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. Small sample — read with care. 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 | 7–7 | 0–2 |
| Avg odds | 1.94 | 7.67 |
| ROI % | -19.0% | -100.0% |
| Units P/L | -2.66u | -2.00u |
Small sample: ROI stabilizes with more matches; fewer than 10 in the window is noisy.
Travel
Last 30 days
| Metric | Klaassen | Zhang |
|---|---|---|
| Countries | 3 | — |
| Events | 4 | — |
| Matches | 6 | — |
| Distance | — | — |
| Route | BEL → FIN → BEL → NED | — |
Host country from the tournament each match was played in, over the last 30 days. Route is the order of countries visited; consecutive stops in the same country are shown once. Distance is the great-circle total between host cities, shown only when every stop in the window is geocoded. A rough fatigue signal, not a headline stat.
Common opponents
Results vs. opponents both players faced · Last 12 months
Across 1 shared opponent, both Klaassen and Zhang posted a 0% win rate.
| Opponent | Klaassen | Zhang |
|---|---|---|
| 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
Spencer Johnson
M15 Rancho Santa Fe · Semifinals
Jul 11
Jack Anthrop
M15 Rancho Santa Fe · Quarterfinals
Jul 10
Stian Klaassen
M15 Rancho Santa Fe · 1st Round
Jul 8
Vignesh Gogineni
M15 San Diego · 1st Round
Jul 1
Ye Chen
M15 Maanshan 8 · 2nd Round
Sep 4
Win rate
Matches, sets and games won · Last 12 months · 3–15 matches
| Metric | Klaassen | Zhang |
|---|---|---|
| Matches won | 47% | 0% |
| Sets won | 50% | 0% |
| Games won | 50% | 25% |
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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