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Predictions graded

Sofia Costoulas #158Belgium0Darya Astakhova #231Russia1

Sets 3-6Mon 5 Oct 2026, 05:58 Predictions gradedFirst RoundHard

Predictions1–233%

Player Profiles

Ranking advantageSofia Costoulas · 73 places

Sofia Costoulas

Belgium

Reached a reported career-high ranking of No. 134 in March 2026. Recent public results show active competition through mid-August.

Current ranking: #158
Peak ranking: #134 · 2026
Current age: —
Preferred surface: —
Hand: Right handed
Height: —

Darya Astakhova

Russia

Russian right-hander, born 26 January 2002. Listed at No. 231 on 10 August 2026, with a reported 20-11 record in 2026.

Current ranking: #231
Peak ranking: —
Current age: 24
Preferred surface: —
Hand: Right handed
Height: —

Quick Take

Pre-match view

Context last updated 4 Oct 2026, 16:08 · Europe/Bucharest

A narrow ranking gap (Costoulas 159, Astakhova 187) sits against the form: Astakhova has won nine of her last 13 hard-court matches, Costoulas seven of 15.

Astakhova is the likelier winner. Three quoted prices carry an edge: Astakhova to win at 2, the match to finish in straight sets at 1.5, and Astakhova to take the second set at 1.95. The 1.8 on over 21.5 games does not.

Context

Astakhova's 21 September result is the strongest single win on her supplied record, coming from a set down against a player more than 100 places above her.
Costoulas is the higher-ranked player here at 159 to Astakhova's 187, but Astakhova has already beaten a top-100 opponent in this window and needed three sets to do it. That sits alongside a 9-4 hard-court record, while her most recent match ended in a straight-set defeat. It gives her a credible case beyond the rankings, without settling how she handles Costoulas's first-set pressure.
- Astakhova beat Magda Linette (ranked 80) 3-6 6-1 7-6 on 21 September 2026.
- It is the highest-ranked opponent she has beaten among the six most recent completed matches supplied.
Second-set scoring — 5.8 games won to 4.5 lost per set — is the strongest part of a 9-4 hard-court record built between 25 August and 29 September 2026.
Second sets are where Astakhova has been most consistent, winning 9 of 13 and reaching tiebreaks four times. That matters against a first-set specialist: Costoulas has taken 10 of 15 opening sets and may need a lead if the match stretches. The 13-match sample excludes two retired matches, so the figures rest on completed sets only.
- Astakhova has won 9 of 13 second sets on hard courts in a sample running 25 August to 29 September 2026.
- Her second sets average 10.4 games, with four second-set tiebreaks in 13 matches.
- Two retired matches are excluded from that 13-match sample.
Her opening-set record is the clearest positive in her supplied hard-court data, while the win-loss line shows how often that start has not been converted.
Costoulas has started well in two-thirds of her tracked hard-court matches, but 7-8 across the same 15 matches says those starts have not carried through. Against an opponent who is stronger in second sets, holding the opening set may matter more than usual. Her first sets have produced only two tiebreaks in 15 matches, so they tend to be decided inside 10 games.
- Costoulas has won 10 of 15 first sets on hard courts in a sample running 29 July to 1 October 2026.
- Her first sets average 5.3 games won to 4.0 lost, with two first-set tiebreaks in 15 matches.
- Her record across the same 15 matches is 7 wins and 8 losses.
The defeat came against an opponent ranked 122 places below her and is the freshest result in this first-round meeting.
This is the most recent completed match on either player's record, and it finished in straight sets against a player well outside the top 200. Astakhova's own latest outing, a 2-6 5-7 loss to Maddison Inglis (140) on 29 September, was also settled in two sets, so neither player arrives off a win. One result alone carries limited weight, but it is the newest evidence either way.
- Sofia Costoulas lost 3-6 4-6 to Sofya Lansere (ranked 281) on 1 October 2026.
- That defeat was her most recent completed hard-court match before this first-round fixture.

BetBugs edges

Compare BetBugs' chances with the market's.

Positive edges · 3

BetBugs probabilities

How likely BetBugs thought each outcome was.

Result0 of 0 landed

Signal quality Medium · Uncertainty band Lean · Market price 2.00
The read
Astakhova's stronger recent win rate and better second-set record give her the edge despite the small ranking gap.
- Astakhova has won 9 of 13 hard-court matches in the tracked window.
- Costoulas has won 7 of 15 hard-court matches in the tracked window.
- Astakhova has won 9 of 13 second sets on hard courts.
- Costoulas lost to Lansere (281) and Inoue (317) in her last five matches.
BetBugs · Match Winnernot gradableDarya AstakhovaEstimated chance58%

Games0 of 0 landed

Signal quality Low · Uncertainty band Slight lean · Not priced
The read
First sets for both players usually end before 10 games, making under the more likely outcome.
- Costoulas's first-set games average 9.3.
- Astakhova's first-set games average 8.9.
- Costoulas has had only two first-set tiebreaks in 15 matches.
- Astakhova has had only one first-set tiebreak in 13 matches.
BetBugs · Set 1 Total Gamesnot gradableUnder 9.5Estimated chance56%
Signal quality Low · Uncertainty band Slight lean · Not priced
The read
Astakhova's second sets often run long, and her tiebreak rate adds to the over chance.
- Astakhova's second sets average 10.4 total games.
- Costoulas's second sets average 9.3 total games.
- Astakhova has had four second-set tiebreaks in 13 matches.
- Costoulas has had two second-set tiebreaks in 15 matches.
BetBugs · Set 2 Total Gamesnot gradableOver 9.5Estimated chance55%
Signal quality Medium · Uncertainty band Slight lean · Market price 1.80
The read
Combined average total games sits just above the line, with Astakhova's longer matches tilting the balance.
- Costoulas's hard-court matches average 21.1 total games.
- Astakhova's hard-court matches average 22.7 total games.
- Astakhova has played five three-set matches in her last 13 hard-court events.
- Astakhova's second sets average 10.4 games, pushing match totals upward.
BetBugs · Total Gamesnot gradableOver 21.5Estimated chance54%

Sets0 of 1 landed

Signal quality Medium · Uncertainty band Strong lean · Market price 1.50
The read
Straight-set wins are the most frequent result in both players' recent hard-court records.
- Costoulas has won 2-0 in 7 of 15 hard-court matches.
- Astakhova has won 2-0 in 6 of 13 hard-court matches.
- Costoulas's straight-set rate is 11 of 15 matches.
- Astakhova's straight-set rate is 8 of 13 matches.
BetBugs · Total Setsnot gradableUnder 2.5Estimated chance74%
Signal quality Medium · Uncertainty band Slight lean · Market price 1.95
The read
Astakhova's second-set record is clearly better, and she often takes control after the first set.
- Astakhova has won 9 of 13 second sets on hard courts.
- Astakhova won the second set in four of her last six matches.
- Costoulas lost the second set in three of her last six matches.
- Astakhova's second-set games average is 5.8 won to 4.5 lost.
BetBugs · Set 2 Winnernot gradableDarya AstakhovaEstimated chance56%
Signal quality Low · Uncertainty band Near coin-flip · Not priced
The read
Costoulas's first-set record is stronger and she starts matches well.
- Costoulas has won 10 of 15 first sets on hard courts.
- Astakhova has won 8 of 13 first sets on hard courts.
- Costoulas won the first set in four of her last six matches.
- Astakhova lost the first set in three of her last six matches.
BetBugs · Set 1 WinnerlostSofia CostoulasEstimated chance51%

Match stats1 of 1 landed

Signal quality Medium · Uncertainty band Lean · Not priced
The read
Neither player reaches a tiebreak in most of their recent hard-court matches.
- Costoulas has had no tiebreak in 11 of 15 hard-court matches.
- Astakhova has had no tiebreak in 7 of 13 hard-court matches.
- Both players average fewer than one tiebreak per match.
- Most matches for both finish without a tiebreak.
BetBugs · Tiebreak in MatchwonNoEstimated chance60%

Prediction history

Darya Astakhova: 3/4 recent winner projections matched

3 of 4 comparable winner projections favouring Darya Astakhova matched the recorded result. This is a limited recent sample, not a guarantee for this match.

Recent evidence for Darya Astakhova4 matches

Date / competitionMatch resultPredictedActualResult

15 Jul·WTA Rome

#233Darya Astakhova1-2#149Noma Akugue Noha

BetBugsDarya Astakhova to win·58%

Missed

15 Jul 2026

WTA Rome

#233Darya Astakhova1-2#149Noma Akugue Noha

Darya Astakhova to win

58%probability

Noma Akugue Noha won

Missed

16 Jun·WTA Brescia

#240Darya Astakhova2-1#325Noemi Basiletti

BetBugsDarya Astakhova to win·65%

Matched

16 Jun 2026

WTA Brescia

#240Darya Astakhova2-1#325Noemi Basiletti

Darya Astakhova to win

65%probability

Darya Astakhova won

Matched

3 Jun·WTA Foggia

#277Darya Astakhova2-1#138Lisa Pigato

BetBugsDarya Astakhova to win·62%

Matched

3 Jun 2026

WTA Foggia

#277Darya Astakhova2-1#138Lisa Pigato

Darya Astakhova to win

62%probability

Darya Astakhova won

Matched

1 Jun·WTA Foggia

#233Xinyu Gao0-2#277Darya Astakhova

BetBugsDarya Astakhova to win·58%

Matched

1 Jun 2026

WTA Foggia

#233Xinyu Gao0-2#277Darya Astakhova

Darya Astakhova to win

58%probability

Darya Astakhova won

Matched

Sofia Costoulas

7W 8L

6-3 6-4#281Sofya Lansere

6-2 7-5#825Kristina Mladenovic

5-7 7-6(2) 6-2#123Tatiana Prozorova

6-3 6-7(3) 6-3#317Hina Inoue

1-6 6-1 6-3#233Zhuoxuan Bai

6-1 6-2#358Kristiana Sidorova

7-6(4) 6-3#758Unknown Player

3-6 6-3 6-4#117Elvina Kalieva

7-5 6-4#235Jennifer Ruggeri

7-6(5) 6-0#250Matilde Jorge

6-3 6-3—Sofia Camila Rojas

6-1 6-1—Eva Alvarez Sande

6-2 6-4#164Gabriela Andrea Knutson

6-2 6-2#318Lizette Cabrera

6-3 6-3#140Maddison Inglis

Darya Astakhova

10W 5L

6-2 7-5#140Maddison Inglis

6-2 6-1#900Desirae Krawczyk

6-2 3-6 6-1#69Alina Korneeva

3-6 6-1 7-6(2)#80Magda Linette

6-4 6-4#163Alexandra Shubladze

6-2 6-7(6) 6-2#263Haruka Kaji

5-2 ret.#291Daria Khomutsianskaya

6-1 4-2 ret.#296Viktoria Morvayova

7-6(5) 7-5#542Jiayi Wang

6-3 6-2#143Joanna Garland

6-3 6-3#517Patcharin Cheapchadej

1-6 7-6(6) 6-1#231Han Shi

6-4 6-3#355Miho Kuramochi

6-1 7-6(5)#299Yuki Naito

4-6 7-6(0) 6-3#131Marina Bassols Ribera

Stat Battle

Last 15 match performance, compared side by side.

SCSofia CostoulasCostoulas

Last 15

4–5

9 core stats · 0 even

Darya AstakhovaAstakhovaDA

Darya Astakhova carries the stronger recent form — Sofia Costoulas's route runs through serve.

Serve · 4–1

1st Serve In55.7%+13.3pp69.0%

1st Serve Won68.3%+8.3pp60.0%

2nd Serve Won47.8%+4.6pp43.2%

Aces / Match2.7+1.80.9

Double Faults / Match2.31.0 fewer3.3

Return · 0–1

Return Pts Won42.8%+6.2pp49.0%

Pressure · 0–2

Break Pts Converted43.8%+10.5pp54.3%

Break Pts Saved48.8%+11.6pp60.4%

Points · 0–1

Total Pts Won50.7%+1.3pp52.0%

Serve · 4–1

55.7%1st Serve In+13.3pp69.0%

68.3%1st Serve Won+8.3pp60.0%

47.8%2nd Serve Won+4.6pp43.2%

2.7Aces / Match+1.80.9

2.3Double Faults / Match1.0 fewer3.3

Return · 0–1

42.8%Return Pts Won+6.2pp49.0%

Pressure · 0–2

43.8%Break Pts Converted+10.5pp54.3%

48.8%Break Pts Saved+11.6pp60.4%

Points · 0–1

50.7%Total Pts Won+1.3pp52.0%

Sofia Costoulas

Darya Astakhova

Quick Take

Context

BetBugs edges

Under 2.5

Darya Astakhova

Darya Astakhova

Over 21.5

Result0 of 0 landed

Games0 of 0 landed

Sets0 of 1 landed

Match stats1 of 1 landed

Sofia Costoulas

Darya Astakhova

Stat Battle