Keisuke Saitoh vs Sam Ryan ZiegannPrediction, Head-to-Head Results, and Stats
Keisuke Saitoh and Sam Ryan Ziegann have met 2 times since 2025; Sam Ryan Ziegann leads 2–0. Their first meeting came at Brisbane 1 in 2025 on hard. On hard courts Ziegann leads 2–0. Ziegann has won the last 2 meetings. Across all meetings Saitoh has taken 1 sets to Ziegann's 4. Their most recent meeting: Sam Ryan Ziegann won at M15 Bali (2026).
Spread & Straight-Sets Form
Completed best-of-3 matches · Last 12 months
| Indicator | Saitoh | Ryan Ziegann | ||
|---|---|---|---|---|
| Indicator | Keisuke Saitoh | Sam Ryan Ziegann | ||
| Wins in straight sets | 68% | 27/40 | 50% | 9/18 |
| Wins a set when losing | 13% | 3/24 | 27% | 8/30 |
| Goes to a deciding set | 25% | 16/64 | 35% | 17/48 |
| Covers −1.5 sets as favorite | 54% | 15/28 | 38% | 6/16 |
| Covers +1.5 sets as underdog | 59% | 16/27 | 46% | 11/24 |
| Tiebreak sets won | 53% | 8/15 | 45% | 10/22 |
| Wins after taking set 1 | 97% | 34/35 | 79% | 15/19 |
| Wins 2-0 after taking set 1 | 77% | 27/35 | 47% | 9/19 |
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 2 completed meetings ended in straight sets (Saitoh 0, Ryan Ziegann 1).
Style Matchup
Playing styles and historical archetype record
Saitoh
🪃 Counterpuncher
Ziegann
💥 Big Hitter
Matchup analysis
🪃 Counterpuncher vs 💥 Big Hitter is historically tight (49% vs 51%, 2,363 matches). Neither style has a clear edge, so form, surface, and the head-to-head matter most.
Previous meetings
2 career meetings, newest first
Aug 1, 2026
M15 Bali
H Hard · Semifinals
Jan 26, 2025
Brisbane 1
H Hard · 1st Round Qualifying
Prop Research
Hit rates on common betting markets · Last 90 days
| Outcome | Saitoh | Ziegann | ||
|---|---|---|---|---|
| Outcome | Keisuke Saitoh | Sam Ryan Ziegann | ||
| 1 or more | 88% | 7/8 | 94% | 15/16 |
| 3 or more | 38% | 3/8 | 75% | 12/16 |
| 5 or more | 13% | 1/8 | 63% | 10/16 |
| 10 or more | 0% | 0/8 | 19% | 3/16 |
| 15 or more | 0% | 0/8 | 6% | 1/16 |
| 20 or more | 0% | 0/8 | 0% | 0/16 |
Player ROI
Hypothetical if you put 1u on each player to win every one of their matches · Last 90 days
| Metric | Saitoh | Ziegann |
|---|---|---|
| W-L | 4–4 | 7–9 |
| Avg odds | 1.68 | 2.69 |
| ROI % | -24.9% | -1.8% |
| Units P/L | -1.99u | -0.28u |
Small sample: ROI stabilizes with more matches; fewer than 10 in the window is noisy.
Travel
Last 30 days
| Metric | Saitoh | Ziegann |
|---|---|---|
| Countries | 2 | 2 |
| Events | 3 | 3 |
| Matches | 3 | 4 |
| Distance | — | — |
| Route | INA → TPE | INA → CHN |
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
Saitoh has a higher win rate against shared opponents (63% vs Ziegann's 25%).
| Opponent | Saitoh | Ziegann |
|---|---|---|
| Isaac Becroft | W 62 76 | L 67 76 16 |
| Rafalentino Ali Da Costa | W 76 76 | W 61 61 |
| Yuta Kawahashi | W 46 64 62 | W 16 61 63 |
| Shu Muto | W 62 62 | L 36 26 |
| Shu Muto | W 62 62 | L 36 26 |
| Geun Jun Kim | L 46 26 | L 36 16 |
| Geun Jun Kim | L 46 26 | L 36 16 |
| Moerani Bouzige | L 67 46 | L 67 46 |
Recent Form
Last five matches per player
Matthew Dellavedova
M25 Taipei · 1st Round
Aug 26
Tsung-Hao Huang
M25 Taipei · 1st Round
Aug 18
Sam Ryan Ziegann
M15 Bali · Semifinals
Aug 1
Sanhui Shin
M15 Bali · Quarterfinals
Jul 31
Rafalentino Ali Da Costa
M15 Bali · 2nd Round
Jul 30
Rafalentino Ali Da Costa
M15 Bali · 2nd Round
Jul 30
Daniel Bagnolini
M15 Bali · 1st Round
Jul 28
Alexander Chang
M15 Bali · 2nd Round
Jul 23
Chan Yeong Oh
M15 Maanshan · 1st Round
Aug 26
Fanming Meng
M15 Maanshan · 1st Round
Aug 19
Isaac Becroft
M15 Bali · Final
Aug 2
Keisuke Saitoh
M15 Bali · Semifinals
Aug 1
Tanapatt Nirundorn
M15 Bali · Quarterfinals
Jul 31
Yuttana Charoenphon
M15 Bali · 2nd Round
Jul 30
Yuta Kawahashi
M15 Bali · 1st Round
Jul 28
Thanaphat Boosarawongse
M15 Bali · Quarterfinals
Jul 24
Rivalry momentum
Cumulative head-to-head lead over time
Win rate
Matches, sets and games won · Last 12 months · 49–64 matches
| Metric | Saitoh | Ziegann |
|---|---|---|
| Matches won | 63% | 39% |
| Sets won | 58% | 39% |
| Games won | 53% | 47% |
Record by tier
Head-to-head record by tournament tier
| Stage | Saitoh | Ziegann |
|---|---|---|
| ITF M15 | 0 | 1 |
| ATP Challenger Tour | 0 | 1 |
By surface
Head-to-head record per surface
| Surface | Saitoh | Ziegann |
|---|---|---|
| Hard | 0 | 2 |
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