Marta Kostyuk vs Mirra Andreeva Betting Tips 2026

French Open 2026: Kostyuk vs Andreeva Semifinal Preview

Roland Garros is down to its final four in the women’s draw, and Thursday’s semifinal between Marta Kostyuk and Mirra Andreeva is the standout clash of the round. A spot in the French Open final is on the line, and these two have history that makes this one considerably more than a neutral contest. One player arrives as the clear favourite. The other has already pulled off the biggest scalp of the tournament.

Marta Kostyuk: The Swiatek Slayer Hunting More

At WTA #15, Kostyuk came into Roland Garros as a dangerous floater in the draw rather than a title contender. She has responded by producing the result of the tournament so far, knocking out Iga Swiatek in straight sets to reach the last four. That win alone demands respect, and it tells you everything about where Kostyuk’s game currently sits.

On clay, she carries an 18-6 record across her last 24 completed matches. That is a strong surface return, and her baseline game suits the red dirt. She is aggressive from the back of the court, willing to take the ball early and dictate rather than grind. The Swiatek win was no fluke, it was built on that exact template.

Her recent form makes for good reading: four wins before a loss in this tournament, with the defeat coming against herself in the data (a result entry error in the feed). The substance is four wins at Roland Garros 2026, capped by beating the most decorated clay-court player of her generation.

Mirra Andreeva: The Number Eight Seed on a Mission

Andreeva sits at WTA #8 with 4,181 ranking points and has been one of the most compelling players on the women’s tour through 2026. Her clay-court numbers are exceptional: 32 wins from 40 completed matches on the surface, an 80% win rate that underlines genuine comfort and quality on dirt.

She has moved through her half of the draw without dropping a set, winning all five matches in straight sets at Roland Garros. That kind of clinical progress through a Grand Slam draw signals a player in full control of her game and her nerves. At 19, Andreeva plays with a maturity that belies her age, constructing points methodically and making opponents solve problems rather than simply reacting to them.

Head-to-Head: Andreeva Holds Every Card

This is where the betting picture gets sharp. Andreeva leads their career head-to-head 2-0, and both wins have come in 2026. She beat Kostyuk in the Brisbane quarter-finals and then again in the Madrid final, both times in straight sets. The clay-court meeting in Madrid is directly relevant here: Andreeva won 2-0 on a surface identical to what they will contest Thursday.

Kostyuk has not yet taken a set off Andreeva in any of their meetings. That is not a small detail. It means there is no evidence from their direct matchups that Kostyuk has found a way to solve Andreeva’s game, even as her overall form has climbed.

Betting Angles

Andreeva is priced at 63/50, which translates to roughly 1.26 in decimal odds. Kostyuk comes in at 39/50, approximately 1.78. The market has this right in terms of direction, but the pricing is tighter than the underlying data suggests it should be.

• Andreeva has beaten Kostyuk twice in 2026, both times without losing a set
• Andreeva’s clay-court form (32-8) significantly outpaces Kostyuk’s (18-6) on volume and depth
• Andreeva has not dropped a set at this tournament; Kostyuk has been tested more
• The Swiatek scalp boosts Kostyuk’s reputation, but Andreeva’s direct dominance over her is the more relevant data point

Kostyuk at 39/50 reflects a level of respect for her Swiatek win that is understandable but potentially overweighted. Beating Swiatek is enormous, yet Andreeva has handled Kostyuk specifically and comfortably on multiple occasions this year. Grand Slam pressure can shift dynamics, but the H2H pattern and surface record both point the same direction.

Our Pick