Chak Lam Coleman Wong and Gauthier Onclin will play each other in the 1st round of the Ostrava Challenger for the 1st time in their career. They are scheduled to play on Monday at 1:30 pm on COURT 3. 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 Gauthier Onclin who should win in 3 sets.
As per the initial odds, Gauthier Onclin is the pick to win this match.
Gauthier Onclin -> 1.59
Chak Lam Coleman Wong -> 2.24
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Prediction and head to head Chak Lam Coleman Wong vs. Gauthier Onclin
There is no head to head record between Chak Lam Coleman Wong and Gauthier Onclin since this will be the first time that they will square off in the main tour.
Chak Lam Coleman Wong
7 - 10win/loss
175
128
LLWWLLLWWL | Year | Total | Hard | Clay | I.hard | Grass | Carpet |
|---|---|---|---|---|---|---|
| 2025 | 9-13 | 6-8 | 2-4 | 1-1 | 0-0 | 0-0 |
| 2024 | 41-36 | 39-26 | 0-2 | 2-4 | 0-4 | 0-0 |
| 2023 | 53-27 | 42-19 | 9-7 | 2-1 | 0-0 | 0-0 |
| 2022 | 24-19 | 20-12 | 3-5 | 1-2 | 0-0 | 0-0 |
| 2021 | 11-7 | 5-4 | 6-3 | 0-0 | 0-0 | 0-0 |
Ranked no. 169, Lam Coleman Wong will start his run in the Ostrava Challenger after he played his last match in Madrid where he lost 7-6(5) 6-1 to Cina in the 1st round on the 23rd of April.
Lam Coleman Wong has a composed 7-10 win-loss record in 2025, 0-1 on clay (See FULL STATS).
Talking about his overall career, Lam Coleman Wong has an overall 139-110 record. He has a flat 18-18 record on clay.
Previously in the Ostrava Challenger
The has never competed in this tournament before.
Gauthier Onclin
12 - 8win/loss
231
192
LLLWWWLWWW | Year | Total | Hard | Clay | I.hard | Grass | Carpet |
|---|---|---|---|---|---|---|
| 2025 | 15-11 | 3-1 | 11-6 | 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, Onclin will start his run in the Ostrava Challenger after he played his last match in M25 Santa Margherita Di Pula where he lost 6-1 6-0 to Fonio in the quarter on the 19th of April.
Onclin has an overall 12-8 win-loss record in 2025, 8-3 on clay (See FULL STATS).
The Belgian’s best result of the current season was reaching the final in M25 Santa Margherita di Pula.
In terms of his career, The Belgian has an overall 223-130 record. He has a positive 96-59 record on clay.
Previously in the Ostrava Challenger
Previously, his best result was reaching the quarter in 2023. See his history.
Head 2 Head
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