Constantin Bittoun Kouzmine and Daniil Ostapenkov will clash against each other in the 1st round of the Istanbul Challenger for the 2nd time in their career. They are scheduled to play on Tuesday at 3:30 pm on COURT B. In the following lines you can find the head to head analysis and prediction.
Prediction, odds and live streaming
The pick for Tennis Tonic is Constantin Bittoun Kouzmine who should win in 3 sets.
As per the initial odds, Constantin Bittoun Kouzmine is the pick to win this match.
Constantin Bittoun Kouzmine -> 1.76
Daniil Ostapenkov -> 1.93
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Prediction and head to head Constantin Bittoun Kouzmine vs. Daniil Ostapenkov
This will be the 2nd time that Constantin Bittoun Kouzmine and Daniil Ostapenkov square off. The head to head is 1-0 for Ostapenkov (see full H2H stats), 1-0 on hard.
The last time that they locked horns, Ostapenkov won 7-6(4) 4-6 6-3 in the 2nd round in M15 Monastir back in 2023.
Constantin Bittoun Kouzmine
32 - 22win/loss
434
424
LWLLLLLWWW | Year | Total | Hard | Clay | I.hard | Grass | Carpet |
|---|---|---|---|---|---|---|
| 2026 | 33-26 | 32-24 | 0-0 | 1-2 | 0-0 | 0-0 |
| 2025 | 42-34 | 38-25 | 4-5 | 0-4 | 0-0 | 0-0 |
| 2024 | 33-31 | 19-18 | 14-13 | 0-0 | 0-0 | 0-0 |
| 2023 | 44-34 | 25-16 | 15-13 | 4-5 | 0-0 | 0-0 |
| 2022 | 50-29 | 41-20 | 7-6 | 1-2 | 0-0 | 1-1 |
Ranked no. 424 (career-high), Constantin will start his run in the Istanbul Challenger after he played his last match in the Samsun Challenger where he lost 3-6 7-5 6-4 to Debru in the final on the 2nd of August.
Constantin has a compiled 32-21 win-loss record in 2026, 31-19 on hard (See FULL STATS).
Bittoun Kouzmine’s best result of the current year was reaching the final in M15 Kayseri.
Talking about his overall career, Constantin has an overall 330-241 record. He has a positive 230-145 record on hard.
Previously in the Istanbul Challenger
Constantin has never competed in this tournament before.
Daniil Ostapenkov
31 - 15win/loss
555
525
LWLWLLWLWL | Year | Total | Hard | Clay | I.hard | Grass | Carpet |
|---|---|---|---|---|---|---|
| 2026 | 33-19 | 26-16 | 4-2 | 3-1 | 0-0 | 0-0 |
| 2025 | 46-19 | 46-19 | 0-0 | 0-0 | 0-0 | 0-0 |
| 2024 | 18-10 | 11-3 | 4-5 | 3-2 | 0-0 | 0-0 |
| 2023 | 32-15 | 31-13 | 1-2 | 0-0 | 0-0 | 0-0 |
| 2022 | 31-20 | 23-14 | 8-6 | 0-0 | 0-0 | 0-0 |
Ranked no. 533 (career-high), Ostapenkov reached the 1st round after defeating Yurii Dzhavakian 7-6(3) 6-1 and Koki Matsuda 7-6(6) 6-3.
In the qualifications, The Belarussian had a good straight sets win against Dzhavakian (7-63 6-1). During the match Ostapenkov scored 61 points vs Dzhavakian’s 40. The Belarussian was pretty aggressive to blast 24 winners.
About the serving games, Ostapenkov recorded 6 aces and he committed only 1 double fault for the entire match. Overall, Daniil Ostapenkov was very efficient on serve to win 75% (24/32) of his 1st serve and 77% (17/22) on the second serve. However, this didn’t prevent his to concede the serve once. Daniil was clinical in his return game without wasting any break point and break Dzhavakian 3 times.
ATP Istanbul Challenger - Daniil Ostapenkov's projected path
Ostapenkov’s best result of the current year was reaching the semifinal in M25 Kutaisi.
The Belarussian has a compiled 30-15 win-loss record in 2026, 23-12 on hard (See FULL STATS).
Head 2 Head
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WWWWWWWWWW Tennis Scores in Istanbul Challenger
- Fajing SunSun – Semen PankinPankin (6-4 6-1) – Stats, scores, rankings
- Ilia SimakinSimakin – Adrian BoitanBoitan (5-7 6-3 6-4) – Stats, scores, rankings
- Antoine GhibaudoGhibaudo – Tuncay DuranDuran (7-5 7-64) – Stats, scores, rankings
- Max BasingBasing – Lucio RattiRatti (7-65 6-1) – Stats, scores, rankings
Upcoming matches in the draw
- Denis YevseyevYevseyev – Yanki ErelErel (1-0) – H2H and prediction
- Akira SantillanSantillan – Digvijaypratap SinghSingh (0-1) – H2H and prediction
- Vadym UrsuUrsu – (1-0) – H2H and prediction
- Gijs BrouwerBrouwer – (0-2) – H2H and prediction
- Constantin Bittoun KouzmineBittoun Kouzmine – (0-1) – H2H and prediction
- Dan AddedAdded – Lucas PoullainPoullain (2-1) – H2H and prediction
- Arthur WeberWeber – Florent BaxBax (1-0) – H2H and prediction
- Saba PurtseladzePurtseladze – Mert AlkayaAlkaya (0-0) – H2H and prediction
