WTA IlkleyFinished

Predictions graded

Mary Stoiana #146United States1Celine Naef #206Switzerland2

Sets 6-1 · 3-6 · 4-6Sat 13 Jun 2026, 13:50 Predictions gradedSemi-FinalGrass

Predictions4–544%

Edges1–420%

Player Profiles

Ranking advantageMary Stoiana · 60 places

Mary Stoiana

United States

WTA official lists Stoiana at a career-high No. 146 at age 23. The former Texas A&M player won two ITF W50 titles in 2025 and reached a WTA 125 quarterfinal in Austin.

Current ranking: #146
Peak ranking: #146
Current age: 23
Preferred surface: —
Hand: Right handed
Height: 168 cm

Celine Naef

Switzerland

WTA official lists Naef at No. 206 with a career high of No. 121. Her WTA bio highlights the 2025 Ilkley semifinal and the 2024 Limoges WTA 125 final, so her current ranking still sits below a higher established level.

Current ranking: #206
Peak ranking: #121 · 2023
Current age: 20
Preferred surface: Hard
Hand: Right handed
Height: 167 cm

Quick Take

Pre-match view

Context last updated 13 Jun 2026, 11:03 · Europe/Bucharest

Stoiana holds a slight edge over Naef in the Ilkley semifinal, backed by a recent grass H2H win and a lighter tournament workload.

Expect a tight, three-set match with value on Stoiana to win, over 21.5 games, and a tiebreak. Naef's strong grass form and serve keep it close, but fatigue may be a factor.

Context

Naef's Ilkley path: qualifying wins on June 7-8, then main-draw wins on June 9, 12 (two matches on June 12).
- Stoiana's Ilkley path: main-draw wins on June 9, 11, 12 (one match per day).
- Naef's June 12 schedule included a 6-3 6-4 win at 18:10 and a 7-6 6-3 win at 22:10, leaving less recovery time.
- Stoiana's June 12 match was a straight-set win at 18:15, with no double-duty day.
H2H: Stoiana d. Naef 7-5 2-6 7-6(5) in the Surbiton second round on June 4, 2026.
- The match featured 33 games and a third-set tiebreak, showing how close the contest was.
- Stoiana saved break points better in that match (60% conversion vs Naef's 44%).
- Both players are on grass again, making the recent H2H directly relevant.
Naef's WTA profile lists the 2025 Ilkley semifinal as one of her best 2025 results.
- She is currently ranked No. 206 and needs a deep run to maintain or improve her ranking.
- Stoiana is at a career-high No. 146 and has no points to defend this week.
- The winner advances to a final worth 81 points, adding to the stakes.

BetBugs edges

Compare BetBugs' chances with the market's.

BetBugs probabilities

How likely BetBugs thought each outcome was.

Result0 of 1 landed

Signal quality Medium · Uncertainty band Lean · Market price 2.25
The read
Stoiana's direct H2H win on grass and fresher legs from a lighter tournament load give her a slight edge, though Naef's strong grass form keeps it close.
- Stoiana won the only H2H meeting on grass 7-5 2-6 7-6(5) on 2026-06-04.
- Stoiana is 5-1 on grass in 2026; Naef is 7-2 on grass in 2026.
- Stoiana has a lighter same-week load (3 main-draw matches) vs Naef's 5 matches including qualifying.
- Stoiana's first-set win conversion is 88% career; Naef's is also 88%.
BetBugs · Match WinnerlostMary StoianaEstimated chance58%

Games1 of 3 landed

Signal quality Medium · Uncertainty band Strong lean · Market price 1.95
The read
The H2H was a three-setter with 33 games, and both players' recent matches often go over 21.5 games, indicating a likely close contest.
- Their only H2H match had 33 games (7-5 2-6 7-6).
- Stoiana's last 5 matches averaged 20.8 games; Naef's averaged 20.4 games.
- Both players have high first-set win conversion (88%), suggesting tight sets.
BetBugs · Total GameswonOver 21.5Estimated chance65%
Signal quality Medium · Uncertainty band Lean · Market price 1.91
The read
Both players tend to play tight first sets, with the H2H and recent matches averaging over 9.5 games.
- H2H first set was 7-5 (12 games).
- Stoiana's last 5 first sets: 7-5, 6-2, 7-5, 4-6, 7-5 (avg 10.2 games).
- Naef's last 5 first sets: 7-6, 6-3, 6-4, 7-5, 6-1 (avg 9.8 games).
BetBugs · Set 1 Total GameslostOver 9.5Estimated chance60%
Signal quality Low · Uncertainty band Slight lean · Not priced
The read
Naef's recent second sets have been longer, and while Stoiana's have been shorter, the overall trend suggests a competitive second set.
- H2H second set was 6-2 (8 games).
- Stoiana's last 5 second sets: 6-1, 6-3, 6-4, 6-3, 6-2 (avg 8.2 games).
- Naef's last 5 second sets: 6-3, 6-4, 7-5, 7-5, 6-4 (avg 10.2 games).
BetBugs · Set 2 Total GameslostOver 9.5Estimated chance55%

Sets3 of 3 landed

Signal quality Low · Uncertainty band Slight lean · Not priced
The read
Both players start matches well, but Stoiana's H2H first-set win and slightly better recent first-set record tip the scale marginally.
- Stoiana won the first set 7-5 in their only H2H meeting.
- Stoiana has won the first set in 4 of her last 5 matches.
- Naef has won the first set in 4 of her last 5 matches.
BetBugs · Set 1 WinnerwonMary StoianaEstimated chance55%
Signal quality Medium · Uncertainty band Slight lean · Not priced
The read
The H2H was a three-setter, and both players have shown they can push matches to a decider, making over 2.5 sets likely.
- Their only H2H went to three sets.
- Stoiana has played 3 three-setters in her last 15 matches; Naef has played 5.
- Both have deciding set win rates around 54-56%.
BetBugs · Total SetswonOver 2.5Estimated chance55%
Signal quality Low · Uncertainty band Slight lean · Not priced
The read
Naef's strong second-set performance in the H2H and recent matches suggests she could level the match if she drops the first.
- Naef won the second set 6-2 in their H2H meeting.
- Naef has won the second set in 4 of her last 5 matches.
- Stoiana has lost the second set in 2 of her last 5 matches.
BetBugs · Set 2 WinnerwonCeline NaefEstimated chance52%

Match stats0 of 1 landed

Signal quality Medium · Uncertainty band Slight lean · Market price 2.20
The read
The H2H featured a tiebreak, and both players' tight set scores suggest a tiebreak is likely in this close matchup.
- H2H had a tiebreak in the third set.
- Stoiana's tiebreak win rate is 64%; Naef's is 51%.
- Both players have played tiebreaks in recent matches (Stoiana 2 in last 15, Naef 1).
BetBugs · Tiebreak in MatchlostYesEstimated chance55%
Signal quality Low · Uncertainty band Near coin-flip · Not priced
The read
The H2H double fault count and both players' moderate double fault rates make over 7.5 a reasonable expectation.
- H2H had 9 double faults (Stoiana 5, Naef 4).
- Stoiana's double fault rate is 3.8%; Naef's is 3.5%.
- Both players average around 3-4 double faults per match.
BetBugs · Total Double FaultsOver 7.5Estimated chance50%

Head-to-Head

1-0 (1 meetings)

W7-5 2-6 7-6(5)Mary Stoiana#142vCeline Naef#206Jun 4, 2026

1 total meetings

Mary Stoiana

10W 5L

7-5 6-1#172Tatiana Prozorova

6-2 6-3#110Lulu Sun

7-5 6-4#136Kayla Day

6-4 3-6 6-0#140Rebeka Masarova

7-5 2-6 7-6(5)#206Celine Naef

4-6 7-6(8) 6-2#110Lulu Sun

6-7(4) 6-3 6-1#113Ashlyn Krueger

6-4 6-4#260Matilde Jorge

3-6 6-4 6-4#244Selena Janicijevic

7-5 6-7(8) 6-2#81Alycia Parks

6-3 6-2#195Angela Fita Boluda

6-4 1-6 6-4#214Maria Lourdes Carle

6-3 7-6(6)#231Eva Vedder

6-1 6-1#659Olga Govortsova

6-1 2-6 6-4#174Elizabeth Mandlik

Celine Naef

9W 6L

7-6(6) 6-3#210Harmony Tan

6-3 6-4#180Akasha Urhobo

6-4 7-5#96Alina Korneeva

7-5 7-5#333Momoko Kobori

6-1 6-4#669Hiroko Kuwata

7-5 2-6 7-6(5)#142Mary Stoiana

6-2 6-3#151Maddison Inglis

4-6 6-4 6-0#140Rebeka Masarova

6-4 6-3#401Carol Zhao

7-5 3-6 6-2#92Sinja Kraus

6-2 6-4#173Luisina Giovannini

6-0 6-1#469Martina Okalova

6-4 2-6 6-1#105Anna Blinkova

6-4 6-0#507Yara Bartashevich

5-7 6-0 6-2#121Polina Kudermetova