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Predictions graded

Gauthier Onclin #178Belgium0Jan-Lennard Struff #58Germany2

Sets 4-6 · 2-6Wed 21 Oct 2026, 18:35 Predictions gradedSecond RoundI.hard

Predictions10–191%

Edges3–0100%

Player Profiles

Ranking advantageJan-Lennard Struff · 120 places

Gauthier Onclin

Belgium

At 25, he reached a career-high No. 167 on 3 August 2026. The ITF lists hard as his preferred surface.

Current ranking: #178
Peak ranking: #167 · 2026
Current age: 25
Preferred surface: Hard
Hand: Right handed
Height: 180 cm

Jan-Lennard Struff

Germany

Struff reached a career-high No. 21 on 19 June 2023. The specified searches did not provide a reliable current injury, comeback, or surface-preference update.

Current ranking: #58
Peak ranking: #21 · 2023
Current age: 36
Preferred surface: Carpet
Hand: Right handed
Height: 193 cm

Quick Take

Pre-match view

Context last updated 21 Oct 2026, 06:32 · Europe/Bucharest

A lucky loser meets a top-60 veteran in the second round: Onclin lost in qualifying before taking an injured seed's place, while Struff, 36, won his opener in two tiebreaks.

Struff is the likelier winner, but the 1.29 on Struff to win, 1.36 on him to take the first set and 1.44 on under 2.5 sets are not worth backing.

Context

Onclin had already lost the final qualifying round to Clement Chidekh when Alexander Blockx withdrew with an ankle injury, and the lucky-loser place put Onclin straight into the second round against Struff. That reprieve is what creates the fixture: Onclin is No. 178 and would otherwise have left Brussels after qualifying, while Struff is a top-60 player who won his opener. Onclin does carry two completed matches on the Centre Court this week, including a three-set win over Harry Wendelken, so venue familiarity is not an issue, but the slot belonged to a seeded player with a bye and gave him a round of rest he had not earned with a win.
- Onclin lost the final round of qualifying to Clement Chidekh 2-6, 6-7(3)
- Alexander Blockx withdrew from the Brussels main draw with an ankle injury and Onclin was entered as a lucky loser in his place
- Onclin's match against Struff is a second-round tie on Centre Court on 21 October 2026
ConfirmedSources checked 21 Oct 2026, 06:30 · Europe/BucharestEurosportwww.eurosport.fr · 20 Oct 2026
Struff's Wimbledon in July 2026, where he reached a first Grand Slam quarter-final at 36 and became the oldest man in the Open Era to do so, marks a late-career peak rather than a one-off, and he opened in Brussels with a 7-6(3) 7-6(3) win over Marcos Giron. The relevance to this fixture is the level gap: Struff has beaten tour-level opposition through 2026, including Daniil Medvedev on grass, while Onclin's wins this season have come largely in Challengers and qualifying. The counterpoint is that both sets against Giron ran to tiebreaks, so his form line into this match rests on a handful of points rather than a dominant scoreline.
- Struff reached his first Grand Slam quarter-final at Wimbledon in July 2026, aged 36
- He was the oldest man in the Open Era to reach a first Grand Slam quarter-final
- He beat Marcos Giron 7-6(3) 7-6(3) in the Brussels first round
ConfirmedSources checked 21 Oct 2026, 06:30 · Europe/Bucharest
That match is a concrete measure of the level Struff has been facing: he won 13 games against a top-five opponent and took the first set. It is evidence of the company he has kept on hard courts, not proof he will reproduce that level against Onclin. The counterpoint is that it remains a loss, so it shows the level he has faced rather than a result he can repeat.
- On 10 October 2026, Struff lost 6-4 4-6 3-6 to Daniil Medvedev, ranked No. 5, on hard.
- Struff won 13 games to Medvedev's 16 across three sets.
The split is lopsided: four of Onclin's six wins went to a third set, while six of his eight defeats ended in straight sets. That makes the opening set especially important, because when he has been beaten in this window the match has often not reached a decider. The counterpoint is that the sample is only 14 matches, so it describes a recent pattern rather than a fixed tendency.
- Onclin's 14 completed hard-court matches from 12 August to 18 October 2026 included six 0-2 losses and two 2-0 wins.
- Four of his six wins were 2-1, and his average match length was 2.43 sets.

BetBugs edges

Compare BetBugs' chances with the market's.

Other edges · 3

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

Match WinnerwonUncertainty band: Strong lean

Jan-Lennard Struff

1.29fair 1.32

BetBugs 76% · Market 77.5%

−1.5ppshort

Struff has been competing at a much higher level, beating top-70 opposition on hard while Onclin has been losing to players ranked around his own mark.

Set 1 WinnerwonUncertainty band: Strong lean

Jan-Lennard Struff

1.36fair 1.52

BetBugs 66% · Market 73.5%

−7.5ppshort

Struff has started matches better than Onclin on this surface and faces the weaker ranked player.

Total SetswonUncertainty band: Lean

Under 2.5

1.44fair 1.72

BetBugs 58% · Market 69.4%

−11.4ppshort

Both players' recent scorelines lean toward matches finishing inside two sets.

BetBugs probabilities

How likely BetBugs thought each outcome was.

Result1 of 1 landed

Signal quality Medium · Uncertainty band Strong lean · Market price 1.29
The read
Struff has been competing at a much higher level, beating top-70 opposition on hard while Onclin has been losing to players ranked around his own mark.
- Struff is ranked 58, Onclin 178
- Struff is 5-5 on hard in this window, with two of those losses to world No. 5 Daniil Medvedev
- Onclin is 6-8 on hard and lost recent matches to players ranked 152, 156, 181 and 186
- Onclin entered as a lucky loser after losing his final qualifying round to Clement Chidekh
BetBugs · Match WinnerwonJan-Lennard StruffEstimated chance76%

Games4 of 5 landed

Signal quality Low · Uncertainty band Lean · Not priced
The read
Onclin has kept his game counts near 50% even in defeats, so a six-game cushion is a reasonable ask.
- Onclin's game margin in his last 15 matches is 161-184 games
- He won 46.7% of games across that span
- Struff's largest recent winning margin was seven games
- Struff lost four of eight completed hard-court matches
BetBugs · Game HandicaplostGauthier Onclin +5.5Estimated chance60%
Signal quality Low · Uncertainty band Lean · Not priced
The read
When Struff wins against this level of opponent, he tends to win by more than a couple of games.
- Struff's recent game margins include +4 vs Landaluce and +7 vs Tirante
- Onclin's four recent losses came by 3, 5, 5 and 7 games
- Struff is 5-5 on hard, Onclin 6-8
- Onclin's games-won rate on hard is 47.6%
BetBugs · Game HandicapwonJan-Lennard Struff -1.5Estimated chance58%
Signal quality Low · Uncertainty band Slight lean · Not priced
The read
The typical match length in both players' recent hard-court results sits just below the line.
- Onclin's hard-court matches averaged 23.4 total games
- Struff's averaged 22.9
- Onclin's four recent losses came by 3 to 7 games
- Both players' second-set averages sit near 10 games
BetBugs · Total GameswonUnder 23.5Estimated chance56%
Signal quality Low · Uncertainty band Slight lean · Not priced
The read
Both players' opening sets sit right on the line, with tiebreaks frequent enough to push past it.
- Onclin's first sets averaged 9.64 total games
- Struff's averaged 9.88
- Struff had two first-set tiebreaks in 8 hard-court matches
- Onclin had one first-set tiebreak in 14
BetBugs · Set 1 Total GameswonOver 9.5Estimated chance52%
Signal quality Low · Uncertainty band Near coin-flip · Not priced
The read
A four-game cushion is within reach for Struff if he wins in straight sets against a lower-ranked player.
- Struff's recent match margins are +2, -3, +4, -5, +7 and -5
- Onclin's last four defeats were by 5, 3, 5 and 7 games
- Onclin won 47.6% of games on hard
- Struff's games-won rate in those matches is not available
BetBugs · Game HandicapwonJan-Lennard Struff -3.5Estimated chance51%

Sets4 of 4 landed

Signal quality Medium · Uncertainty band Strong lean · Market price 1.36
The read
Struff has started matches better than Onclin on this surface and faces the weaker ranked player.
- Struff won 5 of 8 first sets on hard
- Onclin won only 6 of 14 first sets
- Onclin lost 8 of 14 opening sets on hard
- Struff won both sets against Giron via tiebreak
BetBugs · Set 1 WinnerwonJan-Lennard StruffEstimated chance66%
Signal quality Low · Uncertainty band Lean · Not priced
The read
Onclin's second sets have been his weakest phase of matches on hard.
- Struff won 4 of 8 second sets on hard
- Onclin lost 10 of 14 second sets
- Onclin won only 4 of 14 second sets
- Struff's second-set games average is 4.75 won to 5.13 lost
BetBugs · Set 2 WinnerwonJan-Lennard StruffEstimated chance64%
Signal quality Medium · Uncertainty band Lean · Market price 1.44
The read
Both players' recent scorelines lean toward matches finishing inside two sets.
- Onclin has six 0-2 losses and two 2-0 wins in 14 hard-court matches
- Struff has three 2-0 wins and two 0-2 losses in 8 hard-court matches
- Onclin's hard-court matches averaged 2.43 sets
- Struff's averaged 2.38 sets
BetBugs · Total SetswonUnder 2.5Estimated chance58%
Signal quality Low · Uncertainty band Near coin-flip · Not priced
The read
Onclin's recent losses have been wide enough that Struff can close in two sets if he serves as he did against Giron.
- Struff won 3 of his 8 completed hard-court matches 2-0
- Onclin lost 6 of his 14 hard-court matches in straight sets
- Onclin's recent defeats came by margins of 3 to 7 games
- Struff beat Marcos Giron 7-6 7-6 in the first round
BetBugs · Set BettingwonJan-Lennard Struff 2-0Estimated chance50%

Match stats1 of 1 landed

Signal quality Low · Uncertainty band Slight lean · Not priced
The read
Their completed matches usually contain at least one lopsided set, which removes the tiebreak route.
- Onclin had tiebreaks in 3 of 14 hard-court matches
- Struff had tiebreaks in 2 of 8
- Onclin won 3 sets 6-0 or 6-1 in his recent matches
- Several of Onclin's losses featured a 6-1 or 6-2 set
BetBugs · Tiebreak in MatchwonNoEstimated chance57%

Previous match context available

Gauthier Onclin

6W 9L

6-2 7-6(3)#152Clement Chidekh 6-3 4-6 6-0#213Harry Wendelken

6-4 6-7(3) 6-4#186Felix Balshaw

4-6 6-2 6-3#156Daniil Glinka

6-1 6-4#181Sascha Gueymard Wayenburg

7-6(4) 6-2#374Dan Added

6-4 6-1#137Jurij Rodionov

6-4 6-2#335Raphael Perot

7-5 7-5#175Vitaliy Sachko

6-4 6-4#66Vit Kopriva

2-6 6-2 6-3#201Timofey Skatov

6-4 5-7 6-4#232Alejandro Moro Canas

6-3 6-4#565Ryan Seggerman

6-3 6-3#224Andres Andrade

6-4 3-6 6-3#436Tyler Zink

Jan-Lennard Struff

8W 7L

7-6(3) 7-6(3)#88Marcos Giron

4-6 6-4 6-3#5Daniil Medvedev

6-4 6-4#67Martin Landaluce

6-4 6-3#5Daniil Medvedev

6-1 6-4#50Thiago Agustin Tirante

5-7 7-5 4-6 6-2 6-3#21Francisco Cerundolo

6-4 6-3 6-3#75Camilo Ugo Carabelli

6-3 6-4#31Alejandro Tabilo

7-6(4) 2-6 6-3#62Roman Andres Burruchaga

6-1 3-6 6-1#37Alex Michelsen

6-0 6-3#45Mariano Navone

3-6 7-6(5) 6-4#108Alexander Shevchenko

7-5 7-6(4) 6-3#1Jannik Sinner

3-6 6-7(5) 7-6(2) 7-5 4-2 ret.#30Hubert Hurkacz

7-6(4) 7-6(5) 7-5#5Daniil Medvedev

Stat Battle

Last 15 match performance, compared side by side.

GOGauthier OnclinOnclin

Last 15

4–4

9 core stats · 1 even

Jan-Lennard StruffStruffJS

Dead-even recent form — the edges are in serve.

Serve · 2–2 · 1 even

1st Serve In13/15 · 15/1556.9%—56.2%

1st Serve Won13/15 · 15/1567.1%+8.8pp75.9%

2nd Serve Won13/15 · 15/1550.7%+3.0pp47.7%

Aces / Match13/15 · 15/152.8+8.110.9

Double Faults / Match13/15 · 15/152.41.1 fewer3.5

Return · 1–0

Return Pts Won13/15 · 15/1536.6%+1.7pp34.9%

Pressure · 1–1

Break Pts Converted13/15 · 15/1543.4%+2.5pp40.9%

Break Pts Saved13/15 · 15/1553.3%+5.6pp58.9%

Points · 0–1

Total Pts Won13/15 · 15/1548.4%+1.0pp49.4%

Serve · 2–2 · 1 even

56.9%1st Serve In13/15 · 15/15—56.2%

67.1%1st Serve Won13/15 · 15/15+8.8pp75.9%

50.7%2nd Serve Won13/15 · 15/15+3.0pp47.7%

2.8Aces / Match13/15 · 15/15+8.110.9

2.4Double Faults / Match13/15 · 15/151.1 fewer3.5

Return · 1–0

36.6%Return Pts Won13/15 · 15/15+1.7pp34.9%

Pressure · 1–1

43.4%Break Pts Converted13/15 · 15/15+2.5pp40.9%

53.3%Break Pts Saved13/15 · 15/15+5.6pp58.9%

Points · 0–1

48.4%Total Pts Won13/15 · 15/15+1.0pp49.4%