Keisuke Saitoh vs Rafalentino Ali Da CostaPrediction, Head-to-Head Results, and Stats
Keisuke Saitoh and Rafalentino Ali Da Costa have met 1 time since 2026; Keisuke Saitoh leads 1–0. Across all meetings Saitoh has taken 2 sets to Costa's 0. Their most recent meeting: Keisuke Saitoh won at M15 Bali (2026).
Spread & Straight-Sets Form
Completed best-of-3 matches · Last 12 months
| Indicator | Saitoh | Ali Da Costa | ||
|---|---|---|---|---|
| Indicator | Keisuke Saitoh | Rafalentino Ali Da Costa | ||
| Wins in straight sets | 69% | 36/52 | 67% | 4/6 |
| Wins a set when losing | 13% | 3/24 | 0% | 0/4 |
| Goes to a deciding set | 25% | 19/76 | 20% | 2/10 |
| Covers −1.5 sets as favorite | 59% | 22/37 | 100% | 2/2 |
| Covers +1.5 sets as underdog | 62% | 18/29 | 100% | 1/1 |
| Tiebreak sets won | 58% | 11/19 | 50% | 2/4 |
| Wins after taking set 1 | 98% | 42/43 | 100% | 6/6 |
| Wins 2-0 after taking set 1 | 84% | 36/43 | 67% | 4/6 |
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 (Saitoh 1, Ali Da Costa 0).
Previous meetings
1 career meeting, newest first
Jul 30, 2026
M15 Bali
H Hard · 2nd Round
Prop Research
Hit rates on common betting markets · Last 90 days
| Outcome | Saitoh | Costa | ||
|---|---|---|---|---|
| Outcome | Keisuke Saitoh | Rafalentino Ali Da Costa | ||
| 1 or more | 75% | 18/24 | 88% | 7/8 |
| 3 or more | 33% | 8/24 | 63% | 5/8 |
| 5 or more | 0% | 0/24 | 25% | 2/8 |
| 10 or more | 0% | 0/24 | 0% | 0/8 |
| 15 or more | 0% | 0/24 | 0% | 0/8 |
| 20 or more | 0% | 0/24 | 0% | 0/8 |
Player ROI
Hypothetical if you put 1u on each player to win every one of their matches · Last 90 days
| Metric | Saitoh | Costa |
|---|---|---|
| W-L | 16–7 | 3–0 |
| Avg odds | 2.29 | 1.56 |
| ROI % | +18.2% | +56.3% |
| Units P/L | +4.18u | +1.69u |
Small sample: ROI stabilizes with more matches; fewer than 10 in the window is noisy.
Travel
Last 30 days
| Metric | Saitoh | Costa |
|---|---|---|
| Countries | 1 | — |
| Events | 1 | — |
| Matches | 2 | — |
| Distance | 0 mi · 0 km | — |
| Route | CHN | — |
Host country from each tournament in the last 30 days, including the current event even when a player arrived on a bye. 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.
Recent Form
Last five matches per player
Jay Dylan Hara Friend
Wuning 3 Challenger · Semifinals
Oct 10
Akira Santillan
Wuning 3 Challenger · Quarterfinals
Oct 9
Hiroki Moriya
Wuning 3 Challenger · 2nd Round
Oct 7
Dominik Palan
Wuning 3 Challenger · 1st Round
Oct 6
Yusuke Takahashi
Wuning 3 Challenger · 3rd Round Qualifying
Oct 5
Zhicheng Wang
Wuning 3 Challenger · 1st Round Qualifying
Oct 4
Mattia Bellucci
Jingshan Challenger · 3rd Round Qualifying
Sep 29
Koki Matsuda
Jingshan Challenger · 1st Round Qualifying
Sep 28
Karan Singh
M15 Bali · 2nd Round
Sep 10
Shanker Heisnam
M15 Bali · 1st Round
Sep 9
Karan Singh
M15 Bali · 2nd Round
Sep 3
Shanker Heisnam
M15 Bali · 1st Round
Sep 2
Keisuke Saitoh
M15 Bali · 2nd Round
Jul 30
Arjun Rathi
M15 Bali · 1st Round
Jul 29
Ryuki Matsuda
M15 Bali · 2nd Round
Jul 23
Kabir Hans
M15 Bali · 1st Round
Jul 22
Win rate
Matches, sets and games won · Last 12 months · 10–76 matches
| Metric | Saitoh | Costa |
|---|---|---|
| Matches won | 68% | 40% |
| Sets won | 63% | 55% |
| Games won | 54% | 52% |
Record by tier
Head-to-head record by tournament tier
| Stage | Saitoh | Costa |
|---|---|---|
| ITF M15 | 1 | 0 |
By surface
Head-to-head record per surface
| Surface | Saitoh | Costa |
|---|---|---|
| Hard | 1 | 0 |
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