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Predictions graded

Elise Mertens #21Belgium0Nikola Bartunkova #69Czechia2

Sets 1-6 · 4-6Wed 17 Jun 2026, 09:00 Predictions gradedSecond RoundGrass

Predictions3–538%

Edges1–420%

Player Profiles

Ranking advantageElise Mertens · 48 places

Elise Mertens

Belgium

Former singles No. 12 from November 2018. She was still inside the top 25 in singles in late May 2026 and remains one of the tour's strongest doubles players.

Current ranking: #21
Peak ranking: #12 · 2018
Current age: 30
Preferred surface: —
Hand: Right handed
Height: 179 cm

Nikola Bartunkova

Czechia

The 20-year-old Czech was listed at a career-best singles ranking of No. 69 in late May 2026. Her 2026 rise has included a first WTA 1000 last-16 run and a Birmingham grass final.

Current ranking: #69
Peak ranking: #69 · 2026
Current age: 20
Preferred surface: —
Hand: Right handed
Height: 184 cm

Quick Take

Pre-match view

Context last updated 16 Jun 2026, 16:06 · Europe/Bucharest

Mertens' superior grass experience, dominant H2H, and fresher legs give her a strong edge over the fatigued Bartunkova, whose weak serve is a major vulnerability.

Expect a straight-sets win for Mertens with limited total games, supporting bets on under 21.5 games and Mertens -4.5 game handicap.

Context

Reached Birmingham final on June 7, then lost a three-set Rosmalen opener on June 10.
- Won a three-set Berlin opener over Shnaider on June 15, logging over 2.5 hours on court.
- Played 7 matches since June 2, with 5 going to three sets, indicating high physical strain.
Mertens won 6-0, 6-4 on hard court in January 2026.
- Mertens won 55% of return points and converted 50% of break points.
- Bartunkova won only 33% of return points and 21% on second serve.
Season first-serve percentage of 53.6% is well below tour average.
- Double-fault rate of 9.8% means she gives away free points regularly.
- Mertens wins 46% of return points in her career and converts 48% of break points.

BetBugs edges

Compare BetBugs' chances with the market's.

Positive edges · 2

Other edges · 3

The published chance does not exceed the market's implied chance.

Match WinnerlostUncertainty band: Strong lean

Elise Mertens

1.33fair 1.39

BetBugs 72% · Market 75.2%

0.0ppshort

Mertens' dominant H2H, superior grass experience, and Bartunkova's heavy recent workload make her a strong favorite, though the odds slightly overstate her edge.

Set 1 WinnerlostUncertainty band: Strong lean

Elise Mertens

1.40fair 1.54

BetBugs 65% · Market 71.4%

0.0ppshort

Mertens' strong first-set record and Bartunkova's serve vulnerability make Mertens the favorite to take the opening set.

Set BettinglostUncertainty band: Slight lean

Elise Mertens 2-0

1.80fair 1.82

BetBugs 55% · Market 55.6%

0.0ppshort

Mertens' straight-set win rate and Bartunkova's vulnerability in straight sets align with the model estimate, but the odds are slightly below fair value.

BetBugs probabilities

How likely BetBugs thought each outcome was.

Result0 of 1 landed

Signal quality High · Uncertainty band Strong lean · Market price 1.33
The read
Mertens' superior grass pedigree, dominant H2H, and fresher legs give her a clear edge in this Bo3 match.
- Mertens leads H2H 1-0, winning 6-0 6-4 on hard in Jan 2026 with dominant serve/return stats (79% 1st serve win, 55% return points won).
- Mertens has a 63.2% career win rate and 44 grass wins vs Bartunkova's 5 grass wins, indicating a significant surface experience edge.
- Mertens' recent form: 3-1 on grass this season, including a comeback win over Samsonova (rank 37) in Berlin; Bartunkova lost to Vandewinkel (rank 98) in Rosmalen.
- Bartunkova has a heavy recent workload (Birmingham final, Rosmalen, Berlin 3-setter) and a lower first-serve percentage (53.6%) which is vulnerable on grass.
BetBugs · Match WinnerlostElise MertensEstimated chance72%

Games2 of 4 landed

Signal quality Medium · Uncertainty band Lean · Market price 1.80
The read
Mertens' ability to dominate on grass and Bartunkova's potential fatigue point to a relatively quick match with fewer than 21.5 games.
- Mertens' last 5 wins on grass: 13, 12, 12, 12, 12 games won, indicating she often wins in straight sets with limited total games.
- Bartunkova's losses to top-50 players on grass this season: 3-12 vs Mboko, 5-12 vs Svitolina, suggesting she can be overpowered quickly.
- H2H match had only 16 total games (6-0, 6-4).
- Mertens' return points won (46% career) and break conversion (48%) can shorten points and games.
BetBugs · Total GameswonUnder 21.5Estimated chance60%
Signal quality Medium · Uncertainty band Lean · Not priced
The read
Mertens' dominant form and Bartunkova's heavy defeats indicate Mertens can win by at least 4 games.
- Mertens' average games won margin in her last 5 wins: +7.6 games.
- Bartunkova's average games lost margin in her last 5 losses: -7.4 games.
- H2H margin was +10 games for Mertens.
- Mertens' return points won (46%) and break conversion (48%) suggest she can cover a -3.5 game handicap.
BetBugs · Game HandicaplostElise Mertens -3.5Estimated chance60%
Signal quality Low · Uncertainty band Slight lean · Not priced
The read
Mertens' strong starts and Bartunkova's slow starts on grass make an under 9.5 games in set 1 plausible.
- Mertens' first-set scores in recent wins: 6-1, 6-3, 6-4, 6-2, 6-2, averaging 8.4 games.
- Bartunkova's first-set scores in recent losses: 1-6, 2-6, 3-6, 4-6, averaging 8.8 games.
- H2H first set was 6-0 (6 games).
- Grass often leads to quicker sets with fewer games due to more breaks.
BetBugs · Set 1 Total GameswonUnder 9.5Estimated chance55%
Signal quality Low · Uncertainty band Slight lean · Not priced
The read
Assuming Mertens leads, the second set is likely to be quick, staying under 9.5 games.
- Mertens' second-set scores in recent straight-set wins: 6-3, 6-2, 6-1, 6-4, averaging 8.2 games.
- Bartunkova's second-set scores in recent straight-set losses: 2-6, 3-6, 2-6, averaging 8.0 games.
- H2H second set was 6-4 (10 games), but Mertens was in control.
- If Mertens wins the first set, she often closes out the second set efficiently.
BetBugs · Set 2 Total GameslostUnder 9.5Estimated chance55%

Sets0 of 2 landed

Signal quality Medium · Uncertainty band Strong lean · Market price 1.40
The read
Mertens' strong first-set record and Bartunkova's serve vulnerability make Mertens the favorite to take the opening set.
- Mertens won the first set 6-0 in their only H2H meeting.
- Mertens has an 87% first-set win conversion rate in her career, showing she often starts strong.
- Bartunkova's first-serve percentage is only 53.6%, which can lead to early breaks on grass.
- Mertens' recent Berlin match: she lost the first set 1-6 but rebounded; however, against a lower-ranked opponent she is likely to start better.
BetBugs · Set 1 WinnerlostElise MertensEstimated chance65%
Signal quality Medium · Uncertainty band Slight lean · Market price 1.80
The read
Given Mertens' consistency and Bartunkova's recent straight-set losses, a 2-0 victory for Mertens is the most likely set outcome.
- Mertens has won 8 of her last 10 completed matches in straight sets.
- Bartunkova has lost 4 of her last 6 matches in straight sets, including two heavy defeats on grass.
- H2H was a straight-set win for Mertens.
- Mertens' first-serve win percentage (66.6%) and break-point conversion (47.8%) are superior to Bartunkova's (67.7% and 49.6% but with a much weaker second serve).
BetBugs · Set BettinglostElise Mertens 2-0Estimated chance55%

Match stats1 of 1 landed

Signal quality Medium · Uncertainty band Strong lean · Not priced
The read
Neither player is a prolific ace hitter, and with a likely straight-set match, total aces should stay under 7.5.
- Mertens averages 5% aces per serve (career 2121 aces in 793 matches), roughly 2-3 aces per match.
- Bartunkova averages 4% aces per serve (634 aces in 245 matches), also around 2-3 aces per match.
- In their H2H, Mertens hit 8 aces but that was on hard court; grass may slightly increase ace counts but both are not big servers.
- Combined, their ace rates suggest a total under 7.5 is likely in a straight-set match.
BetBugs · Total AcesUnder 7.5Estimated chance65%
Signal quality Medium · Uncertainty band Strong lean · Not priced
The read
Mertens' ability to break serve and Bartunkova's serve vulnerability reduce the chance of a tiebreak occurring.
- Mertens' career tiebreak win percentage is 46%, and Bartunkova's is 49%, both below average.
- In their H2H, there were no tiebreaks.
- Mertens' recent matches: only 1 tiebreak in her last 10 matches.
- Bartunkova has played 3 tiebreaks in her last 5 matches, but against stronger opposition, sets are often decided without tiebreaks.
BetBugs · Tiebreak in MatchwonNoEstimated chance65%
Signal quality Low · Uncertainty band Slight lean · Not priced
The read
Bartunkova's high double-fault rate and the grass surface increase the likelihood of over 5.5 double faults in the match.
- Bartunkova has a high double-fault rate of 9.8% (1561 DFs in 245 matches), averaging ~6.4 per match.
- Mertens' double-fault rate is 6.7% (2787 DFs in 793 matches), averaging ~3.5 per match.
- On grass, the lower bounce can lead to more double faults, especially for Bartunkova with her lower first-serve percentage.
- Combined, their average double faults per match exceed 5.5.
BetBugs · Total Double FaultsOver 5.5Estimated chance55%

Head-to-Head

1-0 (1 meetings)

W6-0 6-4Elise Mertens#24vNikola Bartunkova#62Jan 24, 2026

1 total meetings

Elise Mertens

9W 6L

1-6 6-3 6-0#37Liudmila Samsonova

6-3 6-3#105Elena Gabriela Ruse

6-1 6-2#178Bianca Vanessa Andreescu

6-4 6-0#21Maja Chwalinska

7-5 6-0#117Tatjana Maria

6-3 6-3#5Mirra Andreeva

4-6 7-6(5) 6-3#14Jasmine Paolini

6-4 6-2#68Panna Udvardy

7-5 2-6 7-6(3)#87Karolina Pliskova

6-2 6-1#35Alexandra Eala

1-6 6-3 6-0#10Karolina Muchova

6-3 6-4#94Ella Seidel

7-6(3) 2-6 3-3 ret.#44Mccartney Kessler

6-3 6-2#18Sorana Cirstea

6-2 6-0#138Elvina Kalieva

Nikola Bartunkova

9W 6L

6-2 6-7(2) 6-3#16Diana Shnaider

4-6 7-6(5) 7-5#98Hanne Vandewinkel

5-7 6-3 7-5#35Alexandra Eala

6-4 7-6(7)#95Ashlyn Krueger

6-4 6-7(8) 7-6(4)#263Mika Stojsavljevic

6-4 7-6(4)#200Gabriela Andrea Knutson

3-6 6-3 7-5#152Harriet Dart

6-1 6-2#9Victoria Mboko

6-2 6-3#8Elina Svitolina

6-3 1-6 6-4#28Madison Keys

4-6 6-3 6-4#161Tyra Caterina Grant

4-6 6-4 6-2#26Anastasia Potapova

6-2 6-2#95Ashlyn Krueger

6-7(6) 6-2 7-6(6)#128Alina Charaeva

6-4 2-6 6-3#120Katarzyna Kawa

Elise Mertens

Nikola Bartunkova

Quick Take

Context

BetBugs edges

Elise Mertens -4.5

Under 21.5

Elise Mertens

Elise Mertens

Elise Mertens 2-0

Result0 of 1 landed

Games2 of 4 landed

Sets0 of 2 landed

Match stats1 of 1 landed

Head-to-Head

Elise Mertens

Nikola Bartunkova