Sofia Costoulas vs Elvina Kalieva Prediction (Aug 26, 2026)

Result: Elvina Kalieva won. We gave Elvina Kalieva 51% before the match, so our pick (Elvina Kalieva) was right.

Brier score (lower is better): ours 0.237, market six hours out 0.230.

Our modelElvina Kalieva 51% · Sofia Costoulas 49%
Market price at our callElvina Kalieva 50%
EventUS Open Women Singles · Hard
Scheduled startWed Aug 26, 2026, 06:40 PM ET
Call logged2026-08-26 01:56 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.

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