The WTA indoor swing rolls on this week with the WTA 250 event in Ostrava, Czech Republic, reaching the business end of the tournament. After a competitive set of quarterfinals, the semifinal lineup is locked in, featuring two first-time matchups. Katie Volynets will face Katie Boulter, while Diane Parry meets Tamara Korpatsch in the other semifinal. As always, we here at LWOT give our predictions and analysis–but who will reach the final?

WTA Ostrava Semifinal Prediction
Katie Volynets vs Katie Boulter

Head-to-Head: first meeting 

This will be the first meeting between Volynets and Boulter, and their contrasting styles should make for an intriguing indoor hard-court contest. Volynets has been steady throughout the week, coming through an early three-set test before easing past Tatjana Maria and Alycia Parks in straight sets. She’s looked comfortable in longer rallies, showing patience from the baseline and a strong ability to turn defense into offense. Hard courts remain her most reliable surface, and that consistency has shown in Ostrava.

Boulter arrives in the semifinals with momentum of her own. After a slow start against Lucie Havlickova, she raised her level to defeat Viktorija Golubic and Linda Fruhvirtova without dropping a set. Her serve has been effective, and she’s been more proactive on return, using the indoor conditions to step inside the court and dictate early in points.

Boulter will look to keep rallies short, but Volynets’ ability to absorb pace and extend exchanges could prove decisive. With her steadier form across the week and comfort in longer matches, Volynets appears better equipped to manage the key moments.
Prediction: Volynets in 3 

Diane Parry vs Tamara Korpatsch

Head-to-Head: first meeting 

Parry and Korpatsch also meet for the first time, with both reaching the semifinals without dropping a set. Parry has been particularly convincing, moving past Oceane Dodin, Panna Udvardy, and Nikola Bartunkova with minimal fuss. Her use of spin, slice, and angles has worked well indoors, allowing her to control points despite hard courts not being her strongest surface.

Korpatsch has taken a more physical route, beating Anna Siskova, Emiliana Arango, and Caty McNally through solid defense and reliable returning. She’s stayed composed in tight moments and has been willing to grind for every point.

Parry’s ability to vary pace and finish points more efficiently should make the difference. If she continues to disrupt rhythm and avoid getting drawn into extended exchanges, she should have enough to move through.
Prediction: Parry in 3

Main Photo Credit: Jerry Lai-USA TODAY Sports