Matteo Arnaldi vs Rei Sakamoto Prediction & Betting Tips - ATP Japan Open
ATP - ATP Japan Open
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by Steve Ashfield | in Tennis Predictions
It's not been a good year on outdoor hard courts for unseeded Matteo Arnaldi. Round one of the Japan Open will see him take on wild card Rei Sakamoto. Arnaldi has only won two matches on this surface in 2026 and our prediction is that Sakamoto will get the win.
Round two will see the winner up against either unseeded Alex Michelsen or the top seed Carlos Alcaraz.
Matteo Arnaldi is the world number 37 and that's 100 places above his opponent. However, Arnaldi owes his high ranking to the results he has achieved on clay with 14 victories this year compared to just the couple he has had on outdoor hard courts.
He has lost his last three matches on this surface, last winning a match in early August in the Canadian Open.
On all surfaces he has only won two of his last nine matches.
Rei Sakamoto will be hoping for revenge here. His one previous match against Arnaldi was lost in 2025's Shanghai Masters.
Sakamoto has played 37 matches on outdoor hard courts this year and won 23 of them.
His success has come on the Challenger Tour with two semi-finals and three last eight appearances.
He has reached the second round on this surface in two ATP Tour events this year.
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Matteo Arnaldi v Rei Sakamoto Best Betting Odds
| Bookmaker | 1 | 2 | Bonus up to |
|---|---|---|---|
|
2.08 | 1.72 |
|
|
2.15 | 1.75 |
|
|
2.12 | 1.73 |
|
|
2.12 | 1.73 |
|
|
2.13 | 1.72 |
|
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Who will win the Matteo Arnaldi vs Rei Sakamoto Tennis game?
Our prediction for the Matteo Arnaldi vs Rei Sakamoto match is: Rei Sakamoto wins.
The best winner predictions and betting odds for the Matteo Arnaldi vs Rei Sakamoto game on 30/09/2026 of the current ATP Japan Open season:
- Matteo Arnaldi has a 51.6% chance to win against Rei Sakamoto according to 1xbet ⭐ with the odds of 2.15.
- Rei Sakamoto has a 48.4% probability of winning facing Matteo Arnaldi ⭐ with odds of 1.75 at 1xbet.
Matteo Arnaldi vs Rei Sakamoto Best Prediction and Odds
Based on the bookmaker's betting lines in this match, Matteo Arnaldi has a 51.6 % chance to win.
| Prediction | Chance to win |
|---|---|
| Matteo Arnaldi | 51.6 % |
| Rei Sakamoto | 48.4 % |
Matteo Arnaldi vs Rei Sakamoto Form
Matteo Arnaldi and Rei Sakamoto Last Matches
2/6 (33%)
4/6 (67%)
31 Aug 2026 - ATP US Open
15 Aug 2026 - ATP Cincinnati Open
7 Aug 2026 - ATP National Bank Open
5 Aug 2026 - ATP National Bank Open
16 Jul 2026 - ATP Umag Open
15 Jul 2026 - ATP Umag Open
4/6 (67%)
2/6 (33%)
2 Sept 2026 - ATP US Open
30 Aug 2026 - ATP US Open
28 Aug 2026 - ATP US Open
26 Aug 2026 - ATP US Open
24 Aug 2026 - ATP US Open
25 Jun 2026 - ATP Wimbledon Championships
Matteo Arnaldi vs Rei Sakamoto Stats: Head to Head (H2H)
100 %
0 %
2 Oct 2025 - ATP Shanghai Masters
Matteo Arnaldi - Rei Sakamoto Key Points
- Arnaldi has only won two outdoor hard court matches this year.
- Sakamoto has won 37 outdoor hard court matches in 2026.
- Arnaldi has lost seven of his last nine matches on all surfaces.
- Sakamoto recently won four matches in the US Open before losing to Frances Tiafoe in round two of the main draw.
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Our Matteo Arnaldi vs Rei Sakamoto Prediction
Matteo Arnaldi is on a poor run at the moment, especially on outdoor hard courts. He has won just two of his last ten matches on this surface and has been beaten in each of his last three. He did beat Sakamoto last year in Shanghai. A side bet on this going to three sets may be successful.
Rei Sakamoto has had success on the Challenger Tour this year. He has reached a couple of second rounds on the main ATP Tour. This looks a match for low stakes and our Matteo Arnaldi v Rei Sakamoto prediction is Rei Sakamoto wins.
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All tips are fully researched and given in good faith, but profits cannot be guaranteed.
