Ekaterina Alexandrova vs Marta Kostyuk Prediction (Sep 4, 2026)
Result: Marta Kostyuk won. We gave Marta Kostyuk 71% before the match, so our pick (Marta Kostyuk) was right.
Brier score (lower is better): ours 0.085, market six hours out 0.068.
| Our model | Marta Kostyuk 71% · Ekaterina Alexandrova 29% |
| Market price at our call | Marta Kostyuk 68% |
| Event | US Open Women Singles · Hard |
| Scheduled start | Fri Sep 4, 2026, 02:00 PM ET |
| Call logged | 2026-09-03 00:14 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 US Open 2026 predictions · Ekaterina Alexandrova predictions · Marta Kostyuk predictions
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