Coco Gauff vs Marta Kostyuk Prediction (Aug 21, 2026)
Result: Coco Gauff won. We gave Coco Gauff 58% before the match, so our pick (Coco Gauff) was right.
Brier score (lower is better): ours 0.176, market six hours out 0.185.
| Our model | Coco Gauff 58% · Marta Kostyuk 42% |
| Market price at our call | Coco Gauff 56% |
| Event | Cincinnati · Hard |
| Scheduled start | Fri Aug 21, 2026, 04:00 PM ET |
| Call logged | 2026-08-20 17:47 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 Cincinnati 2026 predictions · Coco Gauff predictions · Marta Kostyuk predictions
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