Aryna Sabalenka's serve goes 200km/h. Her forehand is among the heaviest in women's tennis history. She has won the Australian Open back-to-back and a US Open. She is, in terms of raw ball-striking, the most powerful player in the WTA. She's also capable of a double-fault meltdown at critical moments — which is exactly what makes her prediction markets so interesting.
The Serve Percentage Market
Sabalenka's serve is both her greatest weapon and her biggest liability. When it's working, she's nearly unbeatable. When her double-fault rate climbs above 5%, she loses matches she should win. Prediction markets on her Grand Slam progress have a second-order variable that most casual traders miss: her first-serve percentage in the previous tournament as a leading indicator.
Sabalenka on Boromarket
- →Will Sabalenka win the Australian Open three years in a row?
- →Will she end 2026 as world number one?
- →Head-to-head 2026 vs Swiatek: Will she win more than 50% of their meetings?
- →Roland Garros — can she break through at the one Slam that's eluded her?
- →Year-end Slam count comparison: More or fewer than Swiatek in 2026?
"Sabalenka playing her best tennis is the most dominant performance in women's tennis. Sabalenka playing her second-best tennis loses in the quarterfinals. That range is why her markets are always interesting."
— WTA analyst, Boromarket
The Clay Question
Sabalenka's biggest remaining Slam gap is Roland Garros. Her game — built on power and pace — is theoretically less suited to slow clay than Swiatek's. But she's reached the final there, and her movement has improved significantly. The 'Will Sabalenka win Roland Garros?' market on Boromarket is one of the most debated year-round.
Sabalenka's double-fault count in her last 5 matches is the best leading indicator for her next Slam round performance. It's publicly available data that the market underweights.