ATP Challenger Tour · 1st Round Qualifying · Unicredit Czech Open
Hypothetical if you put 1u on each player to win every one of their matches · Last 90 days
| Metric | Kumstat | Nam |
|---|---|---|
| W-L | - | 2–2 |
| Avg odds | - | 2.25 |
| ROI % | - | -4.3% |
| Units P/L | - | -0.17u |
Small sample: ROI stabilizes with more matches; fewer than 10 in the window is noisy.
First career meeting
Kumstat and Nam have never faced each other on tour.
Serve and return comparison · Last 90 days
| Stat | Kumstat | Nam |
|---|---|---|
| Serve | ||
| 1st Serve In % | 0% | 56.7% |
| 1st Serve Pts Won % | 0% | 71.3% |
| 2nd Serve Pts Won % | 0% | 52.6% |
| Aces / Match | 0 | 4 |
| Double Faults / Match | 0 | 2.8 |
| Break Points Saved % | 0% | 60% |
| Return | ||
| 1st Return Pts Won % | 0% | 39.9% |
| 2nd Return Pts Won % | 0% | 47.4% |
| BP Converted % | 0% | 57.2% |
| Rally | ||
| Winners / Match | 0 | 14.4 |
| Unforced Errors / Match | 0 | 20.2 |
| Net Pts Won % | 0% | 54.6% |
| Total Pts Won % | 0% | 52.3% |
| Surface (Clay) | ||
| Clay Win % | 0% | 0% |
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Match summary
Jan Kumstat meets JiSung Nam in the first round of qualifying at the Unicredit Czech Open on May 31 on outdoor clay. Both players carry rankings outside the top 700, with Kumstat at number 679 and Nam at 768. Neither has faced the other before.
Both players have struggled on clay in recent matches. Kumstat has won 3 of his last 10 clay matches while Nam has converted 5 of 15. Each holds a 40% win rate over his last five matches, and both are currently on losing streaks heading into this qualifier.
Nam builds points through defensive consistency and court position rather than power. Kumstat's profile remains less defined. Nam's recent clay record sits slightly above Kumstat's, though both samples reflect inconsistent form. The match will test which player can establish rhythm first after extended layoffs from competitive tennis.
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