Filip Cristian Jianu vs Jan Kumstat Prediction (Aug 21, 2026)
Result: Jan Kumstat won. We gave Jan Kumstat 49% before the match, so our pick (Filip Cristian Jianu) was wrong.
Brier score (lower is better): ours 0.257, market six hours out 0.078.
| Our model | Filip Cristian Jianu 51% · Jan Kumstat 49% |
| Market price at our call | Filip Cristian Jianu 25% |
| Event | Challenger Prague · Clay |
| Scheduled start | Fri Aug 21, 2026, 10:40 AM ET |
| Call logged | 2026-08-21 00:11 UTC (before first serve) |
Every call we make is logged before the match and graded after it. See the live tennis board, the full match list and our public track record.
All Challenger Prague 2026 predictions · Filip Cristian Jianu predictions · Jan Kumstat predictions
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