Mary Stoiana vs Katerina Siniakova Preview & Prediction | 2026 Japan Women’s Open | Quarter-Final

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Mary Stoiana meets Katerina Siniakova in the quarter-finals at the 2026 Japan Women’s Open at the Utsubo Tennis Center in Osaka, Japan.

Ranking points: WTA 250

Start date/time: 23 October 2026 at 5:50 am

Venue: Utsubo Tennis Center, Osaka, Japan

Surface: Outdoor hard

How to watch on TV: UK – Sky Sports Tennis / USA – Tennis Channel

How to watch online: UK – Sky Go / USA – Tennis Channel

Tickets: Visit this link for the latest Mary Stoiana vs Katerina Siniakova ticket information

Mary Stoiana vs Katerina Siniakova prediction

Katerina Siniakova cruised past Magda Linette to reach the last eight in Osaka.

The Czech was always in control as she dismantled the Pole by a 6-4 6-1 scoreline.

Siniakova will now face Mary Stoiana after the American claimed a 6-2 2-6 6-3 win over home hope Moyuka Uchijima. 

This will be their first meeting with Katerina sitting 28 places better off in the rankings in 86th spot in the rankings. 

All signs point to Siniakova here with her greater pedigree deep in a tournament likely to play a role. 

Mary Stoiana vs Katerina Siniakova tip: Katerina Siniakova to win