Gauthier Onclin and Zsombor Piros will face off in the semifinal of the Ostrava Challenger for the 1st time in their career. They are scheduled to play on Saturday at 1:30 pm on CENTRE COURT. In this post, we analyze their head to head performance and prediction.
Prediction, odds and live streaming
The pick for Tennis Tonic is Zsombor Piros who should win in 3 sets.
As per the initial odds, Zsombor Piros is the pick to win this match.
Zsombor Piros -> 1.58
Gauthier Onclin -> 2.26
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Prediction and head to head Gauthier Onclin vs. Zsombor Piros
There is no head to head record between Gauthier Onclin and Zsombor Piros since this will be the first time that they will play each other in the main tour.
Gauthier Onclin
15 - 8win/loss
232
192
LWLLLLWWWL | Year | Total | Hard | Clay | I.hard | Grass | Carpet |
|---|---|---|---|---|---|---|
| 2025 | 16-13 | 3-1 | 12-8 | 1-4 | 0-0 | 0-0 |
| 2024 | 56-27 | 27-11 | 19-13 | 10-3 | 0-0 | 0-0 |
| 2023 | 40-25 | 1-2 | 15-10 | 23-11 | 1-2 | 0-0 |
| 2022 | 54-26 | 10-8 | 36-15 | 8-3 | 0-0 | 0-0 |
| 2021 | 32-23 | 18-6 | 10-13 | 0-2 | 0-0 | 4-2 |
Ranked no. 207, the Belgian reached the semifinal after defeating Chak Lam Coleman Wong 6-2 5-7 6-3, Edas Butvilas 5-7 6-2 6-2 and Petr Brunclik 1-6 6-0 7-5.
In the quarter against Brunclik, Gauthier recovered from a 1-set down deficit before winning (1-6 6-0 7-5). During the match, Onclin scored 91 points vs Brunclik’s 86. Onclin was very aggressive to blast 48 winners.
Regarding the service games, Onclin fired 6 aces and he committed only 5 double faults. Gauthier Onclin lost the serve 4 times and he saved 7 break points. Furthermore, Onclin put 63% of his first serves in, winning 73% (48/66) of the points behind his 1st serve and 31% (12/39) on the 2nd serve. Gauthier broke Brunclik 5 times after converting 56% of his break points (5/9).
Overall Performance in this tournament
The Belgian has dropped 3 set in this tournament to win 53% of the points he played.
Onclin has a solid record in the last 7 years having won 63% of his matches (226-130). 11-3 on clay in 2025. Regarding his performance on the same surface of this tournament, Onclin has a compiled99-59 record in the last 7 years on clay.
Onclin’s best result of the year was reaching the final in M25 Santa Margherita di Pula.
Gauthier has a composed 15-8 win-loss record in 2025, 11-3 on clay (See FULL STATS).
Previously in the Ostrava Challenger
Zsombor Piros
22 - 9win/loss
160
106
LWWWWWWWWW | Year | Total | Hard | Clay | I.hard | Grass | Carpet |
|---|---|---|---|---|---|---|
| 2025 | 31-10 | 3-3 | 22-5 | 6-2 | 0-0 | 0-0 |
| 2024 | 31-29 | 1-6 | 17-17 | 13-5 | 0-1 | 0-0 |
| 2023 | 48-29 | 3-2 | 35-18 | 5-7 | 5-2 | 0-0 |
| 2022 | 38-23 | 7-6 | 19-9 | 10-7 | 2-1 | 0-0 |
| 2021 | 47-16 | 3-2 | 31-9 | 13-5 | 0-0 | 0-0 |
Ranked no. 270, the Hungarian reached the semifinal after beating Dalibor Svrcina 6-3 6-1, Jan Kumstat 6-3 6-3 and Daniel Rincon 6-3 7-5.
In the quarter, Piros had a good straight sets win against Rincon (6-3 7-5). During the match Piros scored 77 points vs Rincon’s 62. Piros was exceptionally aggressive to blast 23 winners.
Talking about serving, Piros managed to score 2 aces and he committed only 3 double faults. Overall, Zsombor Piros was extremely efficient on serve to win 74% (23/31) of his 1st serve and 69% (18/26) on the second serve. However, this didn’t prevent his to concede the serve once. Zsombor broke Rincon 3 times after converting 27% of his break points (3/11).
Overall Performance in this tournament
The Hungarian hasn’t dropped yet a set in the tournament to win 58% of the points he played.
Zsombor’s best result of the current year was getting to the final in the Oeiras 2 Challenger.
Zsombor has a composed 22-9 win-loss record in 2025, 13-4 on clay (See FULL STATS).
Previously in the Ostrava Challenger
Previously, his best result was reaching the 3rd round in 2019. See his history.
H2H Performance in the tournament (main draw)
Matches, sets, games and points
| Points | Onclin | Piros |
|---|---|---|
| Match played | 3 | 3 |
| Tot Set | 9 | 6 |
| Tot Games | 82 | 55 |
| Pts | 297-267 | 212-156 |
| Total Points | 564 | 368 |
| Winners | 109 | 67 |
| %Winners | 37% | 32% |
Both Onclin and Piros played 3 matches. At the moment, Gauthier Onclin conceded 3 sets while Zsombor Piros hasn’t dropped a set so far. Onclin has played 3 sets more than Piros (9 vs 6). Therefore, Onclin played 27 games more than Piros. The Belgian scored 109 winners (37% of the total points). On the other side, The Hungarian managed to score 67 winners (32%).
Serve Performance
| Serve | Onclin | Piros |
|---|---|---|
| Aces | 7 | 7 |
| Avg per match | 2.3 | 2.3 |
| 1st in | 168/267 | 98/175 |
| %1st in | 63% | 56% |
| 1st pts | 109/168 | 67/98 |
| %1st pts | 65% | 68% |
| 2nd pts | 42/99 | 46/77 |
| %2nd pts | 42% | 60% |
Onclin blasted 7 aces (2.3 per match). Piros blasted 7 aces (2.3 per match). Onclin won 65% points on his first serve. He was rock solid on his second serve to win 42% of the points. On the other side, Piros won 68% of the points on his first serve. He had a solid display on his second serve to win 60% of the points.
How they played the important points
| Breaks | Onclin | Piros |
|---|---|---|
| Won | 21 | 14 |
| Converted | 21/45 | 14/27 |
| % Converted | 47% | 52% |
| Conceded | 28 | 12 |
| Saved | 14 | 7 |
| % Saved | 50% | 58% |
| Times Broken | 14 | 5 |
Onclin broke his opponents 21 times with a 47% conversion rate. Onclin lost his serve 14 times and he saved 50% of the break points that he conceded. Piros broke his opponents 14 times with a 52% conversion rate. The Hungarian conceded his serve 5 times and he saved 58% of the break points that he conceded.
| Onclin | |||||
| R1 Lam Coleman Wong |
R2 Butvilas |
1/4 Brunclik |
Total | ||
|---|---|---|---|---|---|
| Score | 6-2 5-7 6-3 | 5-7 6-2 6-2 | 1-6 6-0 7-5 | ||
| Tot Set | 3 | 3 | 3 | 9 | |
| Tot Games | 29 | 28 | 25 | 82 | |
| pts | 104-95 | 102-86 | 91-86 | 297-267 | |
| Total points | 199 | 188 | 177 | 564 | |
| Winners | 30 | 31 | 48 | 109 | |
| %Winners | 29% | 30% | 53% | 37% | |
| SERVE | |||||
| Aces | 0 | 1 | 6 | 7 | |
| Double Faults | 6 | 2 | 5 | 13 | |
| 1st in | 49/80 | 53/82 | 66/105 | 168/267 | |
| % 1st in | 61% | 65% | 63% | 63% | |
| 1st pts | 30/49 | 31/53 | 48/66 | 109/168 | |
| % 1st pts | 61% | 58% | 73% | 65% | |
| 2nd pts | 14/31 | 16/29 | 12/39 | 42/99 | |
| % 2nd pts | 45% | 55% | 31% | 42% | |
| Breaks | |||||
| Won | 8 | 8 | 5 | 21 | |
| Converted | 8/14 | 8/22 | 5/9 | 21/45 | |
| Converted % | 57% | 36% | 56% | 47% | |
| Conceded | 7 | 10 | 11 | 28 | |
| Saved | 2/7 | 5/10 | 7/11 | 14 | |
| Saved % | 29% | 50% | 64% | 48% | |
| Times Broken | 5 | 5 | 4 | 14 | |
| Piros | |||||
| R1 Svrcina |
R2 Kumstat |
1/4 Rincon |
Total | ||
|---|---|---|---|---|---|
| Score | 6-3 6-1 | 6-3 6-3 | 6-3 7-5 | ||
| Tot Set | 2 | 2 | 2 | 6 | |
| Tot Games | 16 | 18 | 21 | 55 | |
| pts | 67-44 | 68-50 | 77-62 | 212-156 | |
| Total points | 111 | 118 | 139 | 368 | |
| Winners | 23 | 21 | 23 | 67 | |
| %Winners | 34% | 31% | 30% | 32% | |
| SERVE | |||||
| Aces | 3 | 2 | 2 | 7 | |
| Double Faults | 2 | 6 | 3 | 11 | |
| 1st in | 32/55 | 35/63 | 31/57 | 98/175 | |
| % 1st in | 58% | 56% | 54% | 56% | |
| 1st pts | 23/32 | 21/35 | 23/31 | 67/98 | |
| % 1st pts | 72% | 60% | 74% | 68% | |
| 2nd pts | 14/23 | 14/28 | 18/26 | 46/77 | |
| % 2nd pts | 61% | 50% | 69% | 60% | |
| Breaks | |||||
| Won | 5 | 6 | 3 | 14 | |
| Converted | 5/8 | 6/8 | 3/11 | 14/27 | |
| Converted % | 63% | 75% | 27% | 52% | |
| Conceded | 4 | 7 | 1 | 12 | |
| Saved | 3/4 | 4/7 | 0/1 | 7 | |
| Saved % | 75% | 57% | 0% | 44% | |
| Times Broken | 1 | 3 | 1 | 5 | |
Head 2 Head
LWLLLLWWWL
LWWWWWWWWW Tennis Scores in Ostrava Challenger
- Oriol Roca BatallaRoca Batalla – Henri SquireSquire (7-5 6-1) – See score progression
- Hady HabibHabib – Vit KoprivaKopriva (6-3 6-4) – See score progression
- Zsombor PirosPiros – Daniel RinconRincon (6-3 7-5) – See score progression
- Gauthier OnclinOnclin – Petr BrunclikBrunclik (1-6 6-0 7-5) – See score progression
- Matej Vocel/Michael VrbenskyVocel/Michael Vrbensky – Daniel Rincon/Oriol Roca BatallaRincon/Oriol Roca Batalla (7-5 6-75 12-10) – See score progression
- Finn Reynolds/James WattReynolds/James Watt – Edas Butvilas/Chak Lam Coleman WongButvilas/Chak Lam Coleman Wong (6-4 6-1) – See score progression
- Patrik Niklas-Salminen/Szymon WalkowNiklas-Salminen/Szymon Walkow – Luca Sanchez/Mark WhitehouseSanchez/Mark Whitehouse (1-6 6-4 11-9) – See score progression
- Hady HabibHabib – Vit KoprivaKopriva (6-3 6-4) – See score progression
- Oriol Roca BatallaRoca Batalla – Henri SquireSquire (7-5 6-1) – See score progression
- Zsombor PirosPiros – Daniel RinconRincon (6-3 7-5) – See score progression
- Gauthier OnclinOnclin – Petr BrunclikBrunclik (1-6 6-0 7-5) – See score progression
Upcoming matches in the draw
- Hady HabibHabib – Oriol Roca BatallaRoca Batalla (0-1) – H2H and prediction
- Zsombor PirosPiros – Gauthier OnclinOnclin (0-0) – H2H and prediction
