Matteo Arnaldi def. Rei Sakamoto
2-6 6-4 6-4
Matteo Arnaldi defeated Rei Sakamoto 2-6 6-4 6-4 in the 2026 Japan Open first round on hard courts on September 30, 2026.
Match Information
Match Statistics
| Stat | Matteo Arnaldi | Rei Sakamoto |
|---|---|---|
| Serving | ||
AcesServes that land in and are not touched by the returner. | 4 | 8 |
Double faultsService points lost by missing both first and second serve. | 4 | 1 |
First serve %Percentage of service points where the first serve landed in. | 54.0% | 57.0% |
First serve points won %Percentage of points won after making a first serve. | 69.0% | 72.0% |
Second serve points won %Percentage of second-serve points won, including points lost through double faults. | 61.0% | 58.0% |
Break points saved %Percentage of break points won by the server. | 50.0% | 33.0% |
Service points won %Percentage of all points won while serving. | 65.0% | 66.0% |
| Returning | ||
Break points converted %Percentage of break-point chances won by the returner. | 67.0% | 50.0% |
Return points won %Percentage of all points won while returning. | 34.0% | 35.0% |
| Overall | ||
Total points won %Percentage of all completed points won. | 49.0% | 51.0% |
Match Serve+This match’s service points won percentage minus the tour’s season average, in percentage points. Zero is average; +5 means five points above average. Match-weighted available stats; no opponent adjustment. | +0.5 | +1.5 |
Match Return+This match’s return points won percentage minus the tour’s season average, in percentage points. Zero is average; +5 means five points above average. Match-weighted available stats; no opponent adjustment. | -1.5 | -0.5 |
* Match Serve+ and Match Return+ compare this match with the ATP 2026 average from available match stats. Zero is average; +5 means five percentage points above average. No opponent adjustment.
Win Probability
How the market's view of each player's chances changed through the match.
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Player Comparison
| Field | Matteo Arnaldi | Rei Sakamoto |
|---|---|---|
| Country | ITA | JPN |
| Birth date | Feb 22, 2001 | Jun 24, 2006 |
| Age | 25 | 20 |
| Height | 185 cm | 193 cm |
| Handedness | Right-Handed | Right-Handed |
| Backhand style | Two-Handed Backhand | — |
| Ranking (entering) | 37 | 137 |
| Ranking points (entering) | 1,336 | 423 |
| Elo (entering) | 1,701 | 1,633 |
| Current career W-L | 74–79 | 3–7 |
| Current career earnings | $6,201,314 | $492,140 |
No prior-path match data is available for this tournament stage.