Fourth seed Elise Mertens faces fifth seed Maja Chwalinska on Friday in a quarterfinal that is closer than the seeding gap suggests.
Chwalinska owns the only previous meeting, a dominant 6-4, 6-0 win in the second round of Roland Garros this year. She also arrives in blistering form after crushing Oleksandra Oliynykova 6-0, 6-1 in just 59 minutes. The Pole's variety, heavy topspin and defensive range have made her one of the breakout stories of 2026.
Mertens reaches this stage without hitting a ball in anger. She had a first round bye and then advanced when Barbora Krejcikova withdrew with a lower back injury. That keeps her fresh but also means she has no competitive match on this court.
The indoor hard court is the key variable. The Roland Garros result came on clay, where Chwalinska's spin and patience are at their most effective. Indoors, Mertens can take time away with her flat backhand, step in on second serves and shorten points. Models give the Belgian roughly a 65 percent chance, which feels slightly generous but directionally correct.
Expect a tight contest in which Mertens' experience on faster courts edges it late.
**Prediction: Mertens in three sets. Confidence: low.**