Adolfo Daniel Vallejo vs Gael Monfils Prediction & Betting Tips - ATP US Open

ATP - ATP US Open

ATP 60 Paraguay
Adolfo Daniel Vallejo
01/09/2026 18:00
ATP 311 France
Gael Monfils

Prediction :

 

Adolfo Daniel Vallejo wins

 
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 by Steve Ashfield | in ATP US Open Predictions

Gael Monfils is  playing in the US Open for the final time. The wild card was a semi-finalist here ten years ago. His final tournament in New York begins with a match against Adolfo Daniel Vallejo. Monfils has only won three matches on this surface in 2026 and our prediction is a Vallejo win.

Either the 14th seed Learner Tien or unseeded Nuno Borges will be faced by the winner in round two.

Gael Monfils first played in this outdoor hard court Grand Slam in 2008 when his opponent was just four years ago. He announced earlier this year that he'd retire at the end of the 2026 season.

Monfils has only played 13 matches this year, winning just four of them with three first round exits. He's yet to get past the second round of a tournament this year and is 311th in the rankings, 251 places below his opponent.

Adolfo Daniel Vallejo is 60th in the world and that's a career-high for him.

He has only played nine outdoor hard court matches this year, but has won five of them. His most recent tournament saw him reach the second round in Winston Salem. Before that, he made it to the third round  of the Cincinnnati Open.

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Adolfo Daniel Vallejo v Gael Monfils Best Betting Odds

Bookmaker 1 2 Bonus up to
Stake
1.69 2.05
1xbet
1.77 2.23
Melbet
1.7 2.14
Betwinner
1.7 2.14
22bet
1.72 2.13
Check all Adolfo Daniel Vallejo vs Gael Monfils odds

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Who will win the Adolfo Daniel Vallejo vs Gael Monfils Tennis game?

Our prediction for the Adolfo Daniel Vallejo vs Gael Monfils match is: Adolfo Daniel Vallejo wins.

The best winner predictions and betting odds for the Adolfo Daniel Vallejo vs Gael Monfils game on 01/09/2026 of the current ATP US Open season:

  • Adolfo Daniel Vallejo has a 57.91% chance to win against Gael Monfils according to 1xbet ⭐ with the odds of 1.77.
  • Gael Monfils has a 42.09% probability of winning facing Adolfo Daniel Vallejo ⭐ with odds of 2.23 at 1xbet.

Adolfo Daniel Vallejo vs Gael Monfils Best Prediction and Odds

Based on the bookmaker's betting lines in this match, Adolfo Daniel Vallejo has a 57.91 % chance to win.

PredictionChance to win
Adolfo Daniel Vallejo57.91 %
Gael Monfils42.09 %

Adolfo Daniel Vallejo vs Gael Monfils Form

Adolfo Daniel Vallejo and Gael Monfils Last Matches

Adolfo Daniel Vallejo Last matches
L L W W L L
Wins

2/6 (33%)

Losses

4/6 (67%)

25 Aug 2026 - ATP Winston-Salem Open

Botic Van De Zandschulp
2 :  0
Adolfo Daniel Vallejo

17 Aug 2026 - ATP Cincinnati Open

Tommy Paul
2 :  1
Adolfo Daniel Vallejo

15 Aug 2026 - ATP Cincinnati Open

Adolfo Daniel Vallejo
2 :  0
Valentin Vacherot

14 Aug 2026 - ATP Cincinnati Open

Kyrian Jacquet
0 :  2
Adolfo Daniel Vallejo

2 Aug 2026 - ATP National Bank Open

Adolfo Daniel Vallejo
0 :  2
Juncheng Shang

21 Jul 2026 - ATP Kitzbuhel Open

Adolfo Daniel Vallejo
0 :  2
Kilian Feldbausch
Gael Monfils Last matches
L L L W L L
Wins

1/6 (17%)

Losses

5/6 (83%)

13 Aug 2026 - ATP Cincinnati Open

Rinky Hijikata
2 :  1
Gael Monfils

5 Aug 2026 - ATP National Bank Open

Learner Tien
2 :  1
Gael Monfils

3 Aug 2026 - ATP National Bank Open

Kamil Majchrzak
0 :  2
Gael Monfils

25 May 2026 - ATP French Open

Hugo Gaston
3 :  2
Gael Monfils

23 Apr 2026 - ATP Mutua Madrid Open

Camilo Ugo Carabelli
2 :  0
Gael Monfils

7 Apr 2026 - ATP Monte Carlo Masters

Gael Monfils
0 :  2
Alexander Bublik
Adolfo Daniel Vallejo vs Gael Monfils Prediction

Adolfo Daniel Vallejo - Gael Monfils Key Points

  1. Vallejo is 251 places above Monfils in the latest rankings.
  2. Vallejo recently reached round three in Cincinnati.
  3. Monfils has only won three of his nine outdoor hard court matches played this year.
  4. Monfils has only played 13 matches all year with nine losses.
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Our Adolfo Daniel Vallejo vs Gael Monfils Prediction

Could this be the last match Gael Monfils plays in the US Open? He's been playing in this Grand Slam for 18 years, but his career is soon to end. He's only played sporadically this year with just three wins on this surface losing six, including the last two.

Adolfo Daniel Vallejo is better on other surfaces but does have a 5-4 record on outdoor hard courts. He had a recent good run in Cincinnati and should be able to get the win here. Our Adolfo Daniel Vallejo v Gael Monfils prediction is Adolfo Daniel Vallejo wins.

Prediction :

 

Adolfo Daniel Vallejo wins

 
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All tips are fully researched and given in good faith, but profits cannot be guaranteed.