Sofia Costoulas vs Zhuoxuan Bai | Zhuoxuan Bai Wins 1-6 6-1 6-3

UMPIRY

W75 TianjinQuarter-finalHardFri 4 Sept · 14:51Final

Sofia Costoulas(1)WTA #159 · BEL

Zhuoxuan Bai(6)WTA #200 · CHN

SetsGames1

613

166

Zhuoxuan Bai defeated Sofia Costoulas in the quarterfinals of the W75 Tianjin tournament, coming back from a set down to win 1-6, 6-1, 6-3. Both players converted 60% and 100% of their break points respectively, and each had 4 service breaks. Bai served 1 ace and 4 double faults, while Costoulas had 2 aces and 1 double fault.

Generated automatically from Umpiry match data.

Key context

Match story: Zhuoxuan Bai dropped the opening set before beating Sofia Costoulas 1–6 6–1 6–3.

How the match was decided

Auto-generated

Bai Z. came through in three sets, with six breaks of serve.

Breaks of serveBai Z. 6 · Costoulas S. 5
1st-serve points wonBai Z. 61% · Costoulas S. 65%
AcesBai Z. 1 · Costoulas S. 2

Turning points

When the match moved

Set 16–1SetCostoulas S. · Broke to take the set
Set 20–1BreakBai Z. · Broke, never broken back
Set 21–6SetBai Z. · Broke to take the set
Set 30–2BreakBai Z. · Broke, stayed a break up
Set 31–4Break backCostoulas S. · Broke back

Serve flowCostoulas S. broken 6 times · Bai Z. broken 5 times.

Hold to love/15
Hold to 30
Hold to 40 / deuce
Broken
Result unknown

Costoulas S.

5/11Bai Z.

7/12

Set 1Set 2Set 3

Match momentum

Whole matchCostoulas S.Bai Z.

Late momentumBai Z.38

5Last 12 points7

10Last 3 games10

5/5Break points6/8

Break of serve

Match statistics

Costoulas S.Bai Z.

Serve

2Aces1
1Double faults4
65%1st serve points won61%
45% · 5/11Service games held58% · 7/12

Return

100%Break points won60%
5Breaks of serve6

Serve & return performance

Key performance gaps

Double faultsCostoulas S. served 1 double fault, Bai Z. 4. Largest performance gap of the match.+3Costoulas S.1Bai Z.4

Common opponents

3 shared · last 12 months

Costoulas S. and Bai Z. faced 3 of the same opponents in the last 12 months. Costoulas S. went 2–1 (67%) against them, Bai Z. 3–0 (100%). Only 2 of the comparisons are context-comparable — too few for a conclusion.

2–167%Costoulas S. · better vs 0Record vs common opponents3–0100%Bai Z. · better vs 0

Vs common opponents · derived from scorelines

4–3Sets6–1

38–32Games40–23

1–1Tiebreaks0–0

1–0Deciding sets1–0

Only 3 common opponents — small sample, treat as indicative.

vs Morvayova V.#288W6-7 7-6 6-4Manila 125 · hardW6-2 6-3Jiujiang 125 · hard
vs Paquet C.#313W6-1 6-2Les Sables D'Olonne 125 · hardW6-1 6-2Australian Open · hard
vs Guo H.#240Hard to compareL3-6 4-6Roland Garros · clayW3-6 7-5 6-4Jiujiang · hard

Head-to-head

1 meeting · Bai Z. leads 1–0

Bai Z.September 2026W75 TianjinThis matchHard6-1 1-6 3-6

Draw

Closing odds

Next up

vs Garland J.View match

Player context

Before the match

Costoulas S.Bai Z.1 659ELO1 7511 629Hard ELO1 6984–6Last 105–521Age23Career $378K2026 $165KEarningsCareer $793K2026 $204K

Match info

Started14:51 local

Cite this

Zhuoxuan Bai beat Sofia Costoulas 6-1 1-6 3-6. Umpiry, "Sofia Costoulas vs Zhuoxuan Bai — W75 Tianjin Quarter-final", https://umpiry.com/match/2026-09-04/bai-vs-costoulas-w75-tianjin-qf?utm_source=cite (as of 4 September 2026).