Seiya Nakanishi vs Tai SachPrediction, Head-to-Head Results, and Stats
Seiya Nakanishi and Tai Sach have met 1 time since 2026; Tai Sach leads 1–0. Across all meetings Nakanishi has taken 0 sets to Sach's 2. Their most recent meeting: Tai Sach won at M15 Harmon (2026).
Spread & Straight-Sets Form
Completed best-of-3 matches · Last 12 months
| Indicator | Nakanishi | Sach | ||
|---|---|---|---|---|
| Indicator | Seiya Nakanishi | Tai Sach | ||
| Wins in straight sets | 67% | 2/3 | 64% | 25/39 |
| Wins a set when losing | 0% | 0/5 | 42% | 15/36 |
| Goes to a deciding set | 13% | 1/8 | 39% | 29/75 |
| Covers −1.5 sets as favorite | 0% | 0/1 | 57% | 20/35 |
| Covers +1.5 sets as underdog | 25% | 1/4 | 61% | 22/36 |
| Tiebreak sets won | — | 52% | 11/21 | |
| Wins after taking set 1 | 100% | 2/2 | 81% | 34/42 |
| Wins 2-0 after taking set 1 | 100% | 2/2 | 60% | 25/42 |
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 (Nakanishi 0, Sach 1).
Previous meetings
1 career meeting, newest first
Jun 3, 2026
M15 Harmon
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 | Nakanishi | Sach |
|---|---|---|
| W-L | 0–3 | 9–9 |
| Avg odds | 5.55 | 1.70 |
| ROI % | -100.0% | -32.5% |
| Units P/L | -3.00u | -5.85u |
Small sample: ROI stabilizes with more matches; fewer than 10 in the window is noisy.
Travel
Last 30 days
| Metric | Nakanishi | Sach |
|---|---|---|
| Countries | — | 2 |
| Events | — | 3 |
| Matches | — | 6 |
| Distance | — | — |
| Route | — | KAZ → TPE |
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.
Recent Form
Last five matches per player
Kazuma Kawachi
Futures 2026
Jul 6
Ryotaro Taguchi
Futures 2026
Jun 29
Tai Leonard Sach
M15 Harmon · Round of 32
Jun 3
Tai Sach
M15 Harmon · 1st Round
Jun 3
Duckhee Lee
Futures 2026
Jun 1
Yuta Kawahashi
M15 Yanagawa City 1 · 2nd Round
Oct 30
Hong-Lin Fu
M15 Yanagawa City 1 · 1st Round
Oct 29
Hong Lin Fu
M15 Yanagawa City · Round of 32
Oct 29
Matthew Dellavedova
M25 Taipei · 2nd Round
Aug 27
Mukund Sasikumar
M25 Taipei · 1st Round
Aug 26
Matthew Dellavedova
M25 Taipei · Quarterfinals
Aug 21
Chih-Jen Ho
M25 Taipei · 2nd Round
Aug 20
Seongwoo Cho
M25 Taipei · 1st Round
Aug 18
Lucio Ratti
Astana Challenger · 1st Round
Aug 10
Chen Dong
M15 Brisbane · 1st Round
Jul 28
Jeremy Zhang
M15 Brisbane · 1st Round
Jul 22
Win rate
Matches, sets and games won · Last 12 months · 8–75 matches
| Metric | Nakanishi | Sach |
|---|---|---|
| Matches won | 38% | 52% |
| Sets won | 35% | 52% |
| Games won | 43% | 51% |
Record by tier
Head-to-head record by tournament tier
| Stage | Nakanishi | Sach |
|---|---|---|
| ITF M15 | 0 | 1 |
By surface
Head-to-head record per surface
| Surface | Nakanishi | Sach |
|---|---|---|
| Hard | 0 | 1 |
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