MexicoWTA MonterreyFinished

Predictions graded

Janice Tjen #370Yuliia Starodubtseva #65Ukraine2

Sets 4-6 · 3-6Tue 25 Aug 2026, 23:00 Predictions gradedSecond RoundHard

Predictions1–614%

Edges0–30%

Player Profiles

Ranking advantageJanice Tjen · 28 places

Janice Tjen

Indonesian player born 6 May 2002. She reached a career-high singles ranking of No. 36 on 23 February 2026; the official ITF profile lists a 2026 record of 9-9 on hard courts, without establishing a declared preferred surface.

Current ranking: #37
Peak ranking: #36 · 2026
Current age: 24
Preferred surface: —
Hand: Right handed
Height: 171 cm

Yuliia Starodubtseva

Ukraine

Starodubtseva reached a reported career-high singles ranking of No. 53 in April 2026. Reliable public material from the requested searches did not establish a preferred surface or current physical concern.

Current ranking: #65
Peak ranking: #53 · 2026
Current age: 26
Preferred surface: —
Hand: Right handed
Height: —

Quick Take

Pre-match view

Context last updated 25 Aug 2026, 15:21 · Europe/Bucharest

Tjen's ranking and serving edge make her the likely winner, but her recent hard-court form is shaky and she may be fatigued from a long first-round match.

The strongest betting value lies in the match going over 21.5 games and over 2.5 sets, as both players frequently play three-setters on hard courts.

Context

Tjen's first-round singles match on 25 August went to a third-set tiebreak, lasting over two hours.
- She also played a three-set doubles match on 24 August, adding more same-event court time.
- Her recent hard-court matches average 132 minutes, indicating a pattern of long matches.
Her last 15 hard-court record is 1-3, with only 44.7% of games won.
- She lost to Snigur, Joint, and Stephens on hard courts in August.
- Her first-serve points won on hard courts is just 57.5% in that sample.
Tjen averages 5.8 aces per hard-court match compared to Starodubtseva's 1.3.
- Tjen wins 66.8% of first-serve points on hard courts versus Starodubtseva's 57.5%.
- Tjen averages 4.8 double faults per hard-court match, which can give her opponent free points.

BetBugs edges

Compare BetBugs' chances with the market's.

Positive edges · 2

Other edges · 1

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

Match WinnerlostUncertainty band: Lean

Janice Tjen

1.65fair 1.72

BetBugs 58% · Market 60.6%

0.0ppshort

Tjen's superior ranking and career hard-court win percentage support her as favorite, but the edge is below the 2-point threshold for a medium-confidence bet.

BetBugs probabilities

How likely BetBugs thought each outcome was.

Result0 of 1 landed

Signal quality Medium · Uncertainty band Lean · Market price 1.65
The read
Tjen's superior hard-court form and ranking give her a moderate edge, supported by better recent surface-specific stats.
- Tjen last 15 hard-court record: 3-3 (50%), with 49.7% games won and 50.1% total points won.
- Starodubtseva last 15 hard-court record: 1-3 (25%), with 44.7% games won and 48.0% total points won.
- Tjen ranking 35 vs Starodubtseva ranking 74.
- Tjen career hard-court win percentage 75.1% vs Starodubtseva 57.2%.
BetBugs · Match WinnerlostJanice TjenEstimated chance58%

Games1 of 3 landed

Signal quality Medium · Uncertainty band Lean · Market price 1.85
The read
Both players have shown a tendency for longer matches on hard courts, with multiple three-setters in recent form.
- Tjen last 15 hard-court average match duration 132.1 minutes.
- Starodubtseva last 15 hard-court average match duration 134.7 minutes.
- Tjen recent hard-court matches: 3 of 6 went to three sets.
- Starodubtseva recent hard-court matches: 2 of 4 went to three sets.
BetBugs · Total GameslostOver 21.5Estimated chance62%
Signal quality Low · Uncertainty band Slight lean · Not priced
The read
Competitive first sets are likely given both players' moderate serve effectiveness and recent hard-court form.
- Tjen last 15 hard-court first-serve points won 66.8%.
- Starodubtseva last 15 hard-court first-serve points won 57.5%.
- Both players have similar first-serve percentages around 58-61%.
BetBugs · Set 1 Total GameswonOver 9.5Estimated chance55%
Signal quality Low · Uncertainty band Slight lean · Not priced
The read
Second sets often tighten as players adjust, and both have comparable second-serve and break-point stats.
- Tjen last 15 hard-court second-serve points won 46.2%.
- Starodubtseva last 15 hard-court second-serve points won 47.0%.
- Both players have similar break-point conversion rates around 35-42% on hard courts.
BetBugs · Set 2 Total GameslostOver 9.5Estimated chance52%

Sets0 of 2 landed

Signal quality Medium · Uncertainty band Lean · Market price 2.30
The read
Both players have a high frequency of three-set matches in recent hard-court and overall form, suggesting a competitive match.
- Tjen last 15 hard-court: 3 of 6 matches went to three sets.
- Starodubtseva last 15 hard-court: 2 of 4 matches went to three sets.
- Tjen overall last 15: 5 of 15 matches went to three sets.
- Starodubtseva overall last 15: 6 of 15 matches went to three sets.
BetBugs · Total SetslostOver 2.5Estimated chance58%
Signal quality Low · Uncertainty band Slight lean · Not priced
The read
Tjen's stronger first-serve performance on hard courts in recent matches gives her a slight edge in the opening set.
- Tjen first-set win conversion career 92%.
- Starodubtseva first-set win conversion career 87%.
- Tjen last 15 hard-court first-serve points won 66.8% vs Starodubtseva 57.5%.
BetBugs · Set 1 WinnerlostJanice TjenEstimated chance55%

Match stats0 of 0 landed

Signal quality Low · Uncertainty band Slight lean · Not priced
The read
Tjen's significantly higher ace rate on hard courts should push the combined total over 5.5.
- Tjen last 15 hard-court aces per match: 5.8.
- Starodubtseva last 15 hard-court aces per match: 1.3.
- Tjen career aces: 509 in 189 matches (2.7 per match).
- Starodubtseva career aces: 265 in 285 matches (0.9 per match).
BetBugs · Total Acesnot gradableOver 5.5Estimated chance55%
Signal quality Low · Uncertainty band Slight lean · Not priced
The read
Tjen's high double-fault rate on hard courts, combined with Starodubtseva's moderate rate, makes over 6.5 plausible.
- Tjen last 15 hard-court double faults per match: 4.8.
- Starodubtseva last 15 hard-court double faults per match: 2.5.
- Tjen overall last 15 double faults per match: 3.7.
- Starodubtseva overall last 15 double faults per match: 2.5.
BetBugs · Total Double Faultsnot gradableOver 6.5Estimated chance52%

Previous match context available

Janice Tjen

5W 10L

2-6 6-3 7-6(5)#112Dayana Yastremska

6-1 7-6(5)#5Mirra Andreeva

7-6(8) 5-7 7-5#55Viktorija Golubic

7-6(9) 7-5#45Liudmila Samsonova

1-6 6-3 7-6(7)#22Anna Kalinskaya

6-4 6-2#151Rebecca Sramkova

6-7(5) 6-1 6-4#59Daria Kasatkina

6-1 7-6(3)#32Leylah Annie Fernandez

7-5 6-7(5) 6-3#64Caty McNally

6-3 6-2#79Tatjana Maria

7-6(4) 6-1#176Greetje Minnen

6-1 6-3#62Ashlyn Krueger

6-4 3-6 6-2#227Nao Hibino

6-4 6-3#27Emma Navarro

6-3 3-6 6-0#58Maria Camila Osorio Serrano

Yuliia Starodubtseva

6W 9L

6-3 6-4#48Lilli Tagger

6-4 6-3#44Daria Snigur

4-6 6-1 6-3#75Maya Joint

6-4 5-7 6-2#208Sloane Stephens

6-7(3) 6-4 6-1#94Anna Blinkova

6-4 3-6 6-3#101Anastasia Zakharova

6-4 6-7(3) 6-4#27Emma Navarro

6-7(8) 7-5 6-4#75Maya Joint

6-3 7-5#82Xiyu Wang

3-6 6-1 7-6(4)#2Elena Rybakina

6-3 6-1#94Anna Blinkova

6-3 7-6(3)#49Anhelina Kalinina

6-4 6-2#212Angela Fita Boluda

1-6 6-2 6-3#23Madison Keys

7-5 2-6 6-2#91Katie Volynets

Stat Battle

Last 15 match performance, compared side by side.

JTJanice TjenTjen

Last 15

3–5

9 core stats · 1 even

Yuliia StarodubtsevaStarodubtsevaYS

Yuliia Starodubtseva carries the stronger recent form — Janice Tjen's route runs through serve.

Serve · 2–2 · 1 even

1st Serve In61.3%—61.3%

1st Serve Won65.4%+8.3pp57.1%

2nd Serve Won46.5%+2.0pp48.5%

Aces / Match3.9+2.71.2

Double Faults / Match3.71.2 fewer2.5

Return · 0–1

Return Pts Won39.4%+5.9pp45.3%

Pressure · 1–1

Break Pts Converted33.1%+10.4pp43.5%

Break Pts Saved53.4%+3.4pp50.0%

Points · 0–1

Total Pts Won48.6%+0.8pp49.4%

Serve · 2–2 · 1 even

61.3%1st Serve In—61.3%

65.4%1st Serve Won+8.3pp57.1%

46.5%2nd Serve Won+2.0pp48.5%

3.9Aces / Match+2.71.2

3.7Double Faults / Match1.2 fewer2.5

Return · 0–1

39.4%Return Pts Won+5.9pp45.3%

Pressure · 1–1

33.1%Break Pts Converted+10.4pp43.5%

53.4%Break Pts Saved+3.4pp50.0%

Points · 0–1

48.6%Total Pts Won+0.8pp49.4%