Marta Kostyuk vs Sloane Stephens: 34-8 YTD form jumps off the page — our tips

Marta Kostyuk is putting together a absolute belter of a season, boasting a stunning 34-8 YTD record with an 81% win rate that jumps off the page. The World No. 11 steps onto the court for this WTA Second Round clash on Thursday, 3 September at 4:00 am AEST aiming to reassert her dominance.

Facing her across the net is veteran Sloane Stephens, who comes into this contest looking to make a big statement after turning in a sharp opening-round victory. With plenty of intrigue surrounding this match, we take a look at the key numbers on the board.

Who Will Win? World No. 11 Form vs Grand Slam Pedigree

The numbers say Marta Kostyuk holds a massive statistical edge heading into this matchup. With 34 wins from 42 outings this year and two titles already under her belt in 2026, the Ukrainian star has been rock solid. Her last start was a tight three-set battle against top-tier opponent Iga Swiatek on 9 August (L 6 1 2–3 6 6), but her overall campaign has been nothing short of elite.

Sloane Stephens brings incredible experience as an eight-time career title holder with a career-high ranking of World No. 3, though her current ranking sits at No. 209. The American is coming off a strong victory over Clara Tauson on 1 September (W 6 6–4 1) to bounce back after previous defeats.

In terms of head-to-head history, Kostyuk won their only previous encounter in August 2026 with a tight 7 7–5 5 outcome on hard court. On the head-to-head market board, Kostyuk has drifted from 1.05→1.09 (drifted), while Stephens has firmed from 10.2→7.5 (firmed). While Stephens carries fight, Kostyuk's overall consistency gives her a strong edge in our tennis predictions.

Set Handicap: Can Stephens Take A Set?

In the set handicap market, Kostyuk is set at -1.5 sets. Her line price has drifted from 1.35→1.4 (drifted), whereas Stephens at +1.5 sets has firmed from 3.2→2.95 (firmed).

Kostyuk’s outstanding 81% win percentage this year gets a big tick when looking at her ability to close out matches. Stephens holds a 7-11 YTD record in 2026, but their previous direct clash showed she can compete closely with Kostyuk. Pushing for a tight set margin rates a real chance if Stephens manages to replicate her recent first-round rhythm.

Total Games: Over or Under 19.5?

The Total Games mark is set at 19.5 games. Price movement in the market shows Over 19.5 games drifting from 1.9→2.15 (drifted), while Under 19.5 games has firmed from 1.9→1.7 (firmed).

Their previous head-to-head encounter went to 25 total games in a tense straight-sets tussle. Given Stephens showed good form in her last outing and has the big-match pedigree to stay competitive, another close battle with plenty of games could be on the cards.