Aryna Sabalenka #1Belarus22 – 0Teodora Kostovic #184Serbia0

Signal quality High · Uncertainty band Strong lean · Market price 1.03

The read

Massive ranking and surface-fit gap: Sabalenka's elite grass pedigree and current form overwhelm Kostovic's lower-tier experience.

• Sabalenka is world No.1 with 71.6% career win rate and 89% first-set win conversion.
• Kostovic is ranked No.184, with only 3 career grass wins and a 64.4% win rate mostly on clay.
• Sabalenka has 43 career grass wins and reached Wimbledon SF in 2021, 2023, 2025.
• Kostovic's last 5 matches include losses to players ranked 88, 146, 375, and a retirement.

Signal quality Medium · Uncertainty band Strong lean · Not priced

The read

Sabalenka's superior serve and return should produce a comfortable game margin, covering -5.5.

• Sabalenka's average game margin in wins over lower-ranked players is +5.3 games.
• Kostovic's average game margin in losses to top-150 players is -5.7 games.
• Sabalenka's return points won (45%) and break conversion (47%) suggest multiple breaks.
• Kostovic's break point save rate is only 55.1%, vulnerable against elite returners.

Signal quality Medium · Uncertainty band Strong lean · Not priced

The read

Sabalenka's powerful game should limit rallies and keep total games low against an overmatched opponent.

• Sabalenka's recent wins averaged 12.3 games for her and 7.3 for opponents.
• Kostovic's losses to top-150 players averaged 7.3 games won per match.
• In Bo3, Sabalenka's matches often finish with 18-20 total games when she dominates.
• Kostovic's serve stats (63% first-serve win, 48% second-serve win) are below tour average.

Signal quality Medium · Uncertainty band Lean · Not priced

The read

Sabalenka's ability to break early and Kostovic's weak serve could lead to a quick first set under 8.5 games.

• Sabalenka's recent first-set scores: 6-4, 2-6, 6-4, 3-6, 7-5, 6-0, 7-5, 6-4, 6-2, 6-2.
• Kostovic's recent first-set scores: 6-3, 4-6, 6-1, 5-7, 0-6, 0-6, 6-2, 7-6, 6-7, 6-2.
• Sabalenka often wins first sets 6-3 or 6-4, but a 6-2 or 6-1 is possible given the mismatch.
• Kostovic's first-set losses are often one-sided (0-6, 0-6, 4-6, 5-7).

Signal quality High · Uncertainty band Strong lean · Market price 1.10

The read

Sabalenka's fast starts and Kostovic's vulnerability early in matches make a first-set win for the favorite almost certain.

• Sabalenka's first-set win conversion is 89% career, and she won the first set in 12 of last 15 matches.
• Kostovic lost the first set in 7 of last 15 matches, including to players outside top 100.
• Sabalenka's first-serve win percentage (69%) and return game give her an early edge.
• Kostovic's first-serve win percentage is only 63%, and she faces immediate pressure.

Signal quality High · Uncertainty band Strong lean · Market price 1.08

The read

Sabalenka's consistency and Kostovic's tendency to fade in second sets make another set win for the favorite likely.

• Sabalenka has won the second set in 11 of last 15 matches, even after losing the first.
• Kostovic lost the second set in 8 of last 15 matches, often after competitive first sets.
• Sabalenka's fitness and mental strength in Bo3 are superior, with a 56% deciding-set win rate.
• Kostovic's second-set performance drops against stronger opponents (e.g., 1-6 vs. Rinaldo Persson).

Signal quality High · Uncertainty band Strong lean · Market price 1.20

The read

Sabalenka's ability to start fast and Kostovic's lack of top-level experience make a straight-set win highly likely.

• Sabalenka won 8 of last 15 matches in straight sets, including vs. top-20 opponents.
• Kostovic lost 5 of last 15 matches in straight sets, often against sub-100 players.
• Sabalenka's first-set win conversion is 89%, and she dominates early in matches.
• Kostovic has never faced a top-10 player; her best win is vs. No.136 Sramkova.

Signal quality Medium · Uncertainty band Strong lean · Market price 1.50

The read

The mismatch in quality makes it unlikely that any set will be close enough to require a tiebreak.

• Sabalenka's matches rarely go to tiebreaks against lower-ranked opponents; only 2 of last 15 had a tiebreak.
• Kostovic has played 3 tiebreaks in last 15 matches, but all against players outside top 100.
• Sabalenka's first-serve dominance and return game reduce the likelihood of close sets.
• Grass can produce tiebreaks, but the skill gap here is too large.

Signal quality Medium · Uncertainty band Strong lean · Market price 1.85

The read

Sabalenka's powerful serve on grass should produce enough aces to push the total over 6.5, even if Kostovic contributes little.

• Sabalenka averages 6.2 aces per match career, with higher rates on grass.
• Kostovic averages only 2.2 aces per match, but Sabalenka alone could cover this line.
• In Bo3, Sabalenka's ace count often exceeds 6, especially against weaker returners.
• Grass surface amplifies serve effectiveness, favoring big servers like Sabalenka.

Signal quality Low · Uncertainty band Slight lean · Not priced

The read

Sabalenka's aggressive second serve leads to double faults, and Kostovic's inexperience could add to the total, but it's a borderline call.

• Sabalenka has a high double-fault rate of 6.1% career, averaging 4-5 per match.
• Kostovic's double-fault rate is 5.3%, but she may feel pressure and commit more errors.
• In Bo3, combined double faults often exceed 7 when one player is aggressive and the other is nervous.
• Sabalenka's recent matches show 3-6 double faults per match.