PolandGrodzisk Mazowiecki - PolandFinished

Predictions graded

Alexander Donski #551Canada2Takuya Kumasaka #549Japan0

Sets 7-5 · 6-4Tue 4 Aug 2026, 11:10 Predictions gradedFirst RoundHard

Predictions7–188%

Edges4–0100%

Player Profiles

Ranking advantageTakuya Kumasaka · 2 places

Alexander Donski

Canada

The supplied Tennis API snapshot lists Donski at No. 551; official player data records a career-high singles ranking of No. 525. His documented singles record is more extensive and stronger on hard courts than on clay.

Current ranking: #551
Peak ranking: #525 · 2022
Current age: 28
Preferred surface: Hard
Hand: Right handed
Height: 188 cm

Takuya Kumasaka

Japan

The supplied Tennis API snapshot lists Kumasaka at No. 549; the ITF records his career high of No. 449 on September 15, 2025. His documented singles career is overwhelmingly hard-court based.

Current ranking: #549
Peak ranking: #449 · 2025
Current age: 27
Preferred surface: Hard
Hand: Right handed
Height: 175 cm

Quick Take

Pre-match view

Context last updated 4 Aug 2026, 06:11 · Europe/Bucharest

Donski's dominant hard-court serve (12 aces/match, 77.5% first-serve points won) and 5-1 recent record give him a clear edge over Kumasaka, but his heavy recent workload and high double-fault rate add risk.

The best betting angles are over 21.5 total games and over 12.5 total aces, while Donski 2-0 at 2.30 offers a small positive edge. Avoid backing Kumasaka, as his serve and form are significantly weaker.

Context

Donski played 3h42 across two qualifying wins on August 2-3, beating Kenny de Schepper and Nitin Kumar Sinha.
- Kumasaka last played on July 28, a straight-set loss to Florent Bax, giving him a full week of rest.
- Donski's recent hard-court matches average 139 minutes, and he has played three matches in four days including this one.
Donski last15 hard: 12.0 aces per match, 77.5% first-serve points won (6 matches tracked).
- Kumasaka last15 hard: 2.5 aces per match, 66.3% first-serve points won (15 matches tracked).
- Donski's first-serve points won on hard is 11.2 percentage points higher than Kumasaka's.
Donski last15 hard: 8.2 double faults per match (49 in 6 matches).
- Kumasaka last15 hard: 40.8% return points won vs Donski's 35.7%.
- Donski's second-serve points won on hard is 48%, leaving him vulnerable when his first serve misses.

BetBugs edges

Compare BetBugs' chances with the market's.

Other edges · 4

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

Match WinnerwonUncertainty band: Lean

Alexander Donski

1.60fair 1.72

BetBugs 58% · Market 62.5%

0.0ppshort

Donski's dominant hard-court serve and 5-1 recent record give him a clear edge, but the odds slightly overstate his win probability relative to the model estimate.

Set 1 WinnerwonUncertainty band: Slight lean

Alexander Donski

1.65fair 1.82

BetBugs 55% · Market 60.6%

0.0ppshort

Donski's strong first-set conversion rate and superior hard-court serve performance give him a slight edge, but the odds imply a higher probability than our model estimates.

Set BettingwonUncertainty band: Near coin-flip

Alexander Donski 2-0

2.30fair 2.22

BetBugs 42% · Market 43.5%

0.0ppshort

Donski's dominant hard-court form and Kumasaka's struggles against top-300 opponents suggest a straight-set win is slightly undervalued.

Set BettingwonUncertainty band: Near coin-flip

Alexander Donski 2-0

2.30fair 2.17

BetBugs 42% · Market 43.5%

0.0ppshort

Donski's dominant hard-court serve and Kumasaka's poor return game make a straight-set win more likely than the odds imply.

BetBugs probabilities

How likely BetBugs thought each outcome was.

Result1 of 1 landed

Signal quality Medium · Uncertainty band Lean · Market price 1.60
The read
Donski's superior recent hard-court form (5-1, 83.3%) and dominant serve stats (12 aces/match, 77.5% first-serve points won) give him a clear edge over Kumasaka's 46.7% win rate in the same window, despite Donski's heavier recent workload.
- Donski last15 overall record 10-5 (66.7%) vs Kumasaka 7-8 (46.7%)
- Donski last15 hard record 5-1 (83.3%) vs Kumasaka 7-8 (46.7%) on hard
- Donski last15 hard aces per match 12.0 vs Kumasaka 2.5
- Donski last15 hard first serve points won 77.5% vs Kumasaka 66.3%
BetBugs · Match WinnerwonAlexander DonskiEstimated chance58%

Games3 of 3 landed

Signal quality Medium · Uncertainty band Lean · Not priced
The read
Donski's hard-court matches average nearly 30 games, and both players have a majority of recent hard-court matches exceeding 21.5 games, suggesting a competitive, extended contest.
- Donski last15 hard average games per match 29.7 (178 games/6 matches)
- Kumasaka last15 hard average games per match 22.2 (333 games/15 matches)
- Donski last15 hard matches: 4 of 6 went over 21.5 games
- Kumasaka last15 hard matches: 8 of 15 went over 21.5 games
BetBugs · Total GameswonOver 21.5Estimated chance60%
Signal quality Medium · Uncertainty band Lean · Not priced
The read
Both players average over 9.5 games in the first set on hard courts recently, with Donski's 9.8 average and Kumasaka's 9.3 supporting a tight opening set.
- Donski last15 hard set1 average games 9.8 (59 games/6 sets)
- Kumasaka last15 hard set1 average games 9.3 (140 games/15 sets)
- Donski last15 hard: 4 of 6 set1s over 9.5 games
- Kumasaka last15 hard: 8 of 15 set1s over 9.5 games
BetBugs · Set 1 Total GameswonOver 9.5Estimated chance58%
Signal quality Low · Uncertainty band Slight lean · Not priced
The read
Donski's second sets on hard courts average 10.0 games, and while Kumasaka's average is slightly lower, the combined trend leans toward a competitive second set.
- Donski last15 hard set2 average games 10.0 (60 games/6 sets)
- Kumasaka last15 hard set2 average games 9.1 (136 games/15 sets)
- Donski last15 hard: 4 of 6 set2s over 9.5 games
- Kumasaka last15 hard: 7 of 15 set2s over 9.5 games
BetBugs · Set 2 Total GameswonOver 9.5Estimated chance52%

Sets1 of 1 landed

Signal quality Medium · Uncertainty band Slight lean · Market price 1.65
The read
Donski's strong first-set conversion rate (86% career) and superior hard-court serve performance in the last 15 matches make him the favorite to take the opening set.
- Donski career first-set win conversion 86%
- Donski last15 hard first serve points won 77.5%
- Kumasaka last15 hard first serve points won 66.3%
- Donski last15 hard record 5-1
BetBugs · Set 1 WinnerwonAlexander DonskiEstimated chance55%

Match stats0 of 1 landed

Signal quality Medium · Uncertainty band Strong lean · Not priced
The read
Donski's high double-fault rate (8.2 per match on hard) makes the over 7.5 line highly likely, even with Kumasaka's low double-fault count.
- Donski last15 hard double faults per match 8.2
- Kumasaka last15 hard double faults per match 1.8
- Combined average double faults per match 10.0
- Donski last15 hard: 5 of 6 matches over 7.5 double faults
BetBugs · Total Double Faultsnot gradableOver 7.5Estimated chance65%
Signal quality Medium · Uncertainty band Lean · Not priced
The read
Donski's high ace rate (12.0 per match on hard) alone pushes the combined total over 12.5 in most matches, with Kumasaka adding a modest 2.5 aces per match.
- Donski last15 hard aces per match 12.0
- Kumasaka last15 hard aces per match 2.5
- Combined average aces per match 14.5
- Donski last15 hard: 5 of 6 matches over 12.5 aces
BetBugs · Total Acesnot gradableOver 12.5Estimated chance62%
Signal quality Medium · Uncertainty band Slight lean · Not priced
The read
Donski's recent hard-court matches have seen tiebreaks in half of them, and with both players showing competitive sets, a tiebreak is a strong possibility.
- Donski career tiebreak win percentage 59%
- Kumasaka career tiebreak win percentage 47%
- Donski last15 hard: 3 of 6 matches featured a tiebreak
- Kumasaka last15 hard: 5 of 15 matches featured a tiebreak
BetBugs · Tiebreak in MatchlostYesEstimated chance55%

Prediction history

Alexander Donski has been highly reliable when projected to win

In 4 matches where Alexander Donski was predicted to win, he fulfilled the prediction all 4 times. The average estimated probability was 64.3%, with an expected 2.6 fulfilled predictions, yet he exceeded that by winning every match. The current prediction of 58% falls within the historical range of 55% to 78%, suggesting consistency with past projections.

Recent evidence for Alexander Donski4 matches

Date / competitionMatch resultPredictedActualResult

19 Jul·Zug - Switzerland

#550Alexander Donski2-0#374Marko Topo

BetBugsAlexander Donski to win·55%

Matched

19 Jul 2026

Zug - Switzerland

#550Alexander Donski2-0#374Marko Topo

Alexander Donski to win

55%probability

Alexander Donski won

Matched

6 Jul·Iasi - Romania

#528Alexander Donski2-0—Jiri Cizek

BetBugsAlexander Donski to win·62%

Matched

6 Jul 2026

Iasi - Romania

#528Alexander Donski2-0—Jiri Cizek

Alexander Donski to win

62%probability

Alexander Donski won

Matched

5 Jul·Iasi - Romania

#528Alexander Donski2-0—Erik Grevelius

BetBugsAlexander Donski to win·78%

Matched

5 Jul 2026

Iasi - Romania

#528Alexander Donski2-0—Erik Grevelius

Alexander Donski to win

78%probability

Alexander Donski won

Matched

15 Jun·Poznan - Poland

#538Alexander Donski2-0#900Filip Pieczonka

BetBugsAlexander Donski to win·62%

Matched

15 Jun 2026

Poznan - Poland

#538Alexander Donski2-0#900Filip Pieczonka

Alexander Donski to win

62%probability

Alexander Donski won

Matched

Previous match context available

Alexander Donski

10W 5L

6-3 6-4#880Nitin Kumar Sinha 2-6 6-4 7-6(4)#850Kenny de Schepper

6-4 6-3#332Max Hans Rehberg

7-5 6-3#232Juan Pablo Varillas

6-4 6-1#346Marko Topo

7-6(4) 4-6 6-3#322Sascha Gueymard Wayenburg

7-5 6-2—Jiri Cizek

6-2 6-4—Erik Grevelius

6-3 6-3#332Max Hans Rehberg

6-3 6-4#900Filip Pieczonka

6-2 6-4#258Joao Lucas Reis Da Silva

6-2 3-6 7-6(6)#298Philip Henning

4-6 6-4 6-3#721Khololwam Montsi

4-6 7-6(6) 6-2#626Tuncay Duran

7-6(2) 6-7(4) 7-5#348Edward Winter

Takuya Kumasaka

7W 8L

7-6(3) 6-3#247Florent Bax

3-6 6-1 6-2#204Luka Pavlovic

6-3 7-6(1)#413Sergio Callejon Hernando

6-2 6-4—Asier Meneses Perny

6-3 6-1#562Pavel Lagutin

6-3 6-2#793Alejandro Turriziani Alvarez

6-2 6-3#368Robin Bertrand

6-1 6-2—Alvaro Jimenez

6-1 3-6 7-6(9)#660Naoya Honda

6-4 4-6 6-4#732Yuki Mochizuki

4-6 6-4 6-3#781Taisei Ichikawa

7-5 7-5#739Naoki Nakagawa

7-6(4) 4-6 7-6(5)#808Taiyo Yamanaka

6-4 6-2#850Wishaya Trongcharoenchaikul

6-2 6-2#2008Julien De Cuyper

Stat Battle

Last 15 match performance, compared side by side.

ADAlexander DonskiDonski

Last 15

3–4

9 core stats · 2 even

Takuya KumasakaKumasakaTK

Takuya Kumasaka carries the stronger recent form — Alexander Donski's route runs through serve.

Serve · 2–2 · 1 even

1st Serve In53.8%+6.7pp60.5%

1st Serve Won75.4%+9.1pp66.3%

2nd Serve Won50.4%—49.8%

Aces / Match8.9+6.42.5

Double Faults / Match5.73.9 fewer1.8

Return · 0–1

Return Pts Won36.0%+4.8pp40.8%

Pressure · 1–1

Break Pts Converted46.8%+6.5pp53.3%

Break Pts Saved67.1%+5.6pp61.5%

Points · 0–0 · 1 even

Total Pts Won50.6%—50.4%

Serve · 2–2 · 1 even

53.8%1st Serve In+6.7pp60.5%

75.4%1st Serve Won+9.1pp66.3%

50.4%2nd Serve Won—49.8%

8.9Aces / Match+6.42.5

5.7Double Faults / Match3.9 fewer1.8

Return · 0–1

36.0%Return Pts Won+4.8pp40.8%

Pressure · 1–1

46.8%Break Pts Converted+6.5pp53.3%

67.1%Break Pts Saved+5.6pp61.5%

Points · 0–0 · 1 even

50.6%Total Pts Won—50.4%