Sofia Johnson vs Ivana Sebestova Prediction (Sep 20, 2026)
Result: Sofia Johnson won. We gave Sofia Johnson 72% before the match, so our pick (Sofia Johnson) was right.
Brier score (lower is better): ours 0.078, market six hours out 0.003.
| Our model | Sofia Johnson 72% · Ivana Sebestova 28% |
| Market price at our call | Sofia Johnson 50% |
| Event | 125K Porto · Hard |
| Scheduled start | Sun Sep 20, 2026, 10:10 AM ET |
| Call logged | 2026-09-19 23:23 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 WTA 125 Porto 2026 predictions
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