Dayeon Back vs Maya Joint — Korea Open - Seoul Round of 16

Korea Open - Seoul · WTA · Round of 16
KORWC
Dayeon Back
#272WTA
$36kYTD
$161kCAREER
24 yrs
Last 10
WLLLWLLLWW
—
Sets
Wednesday, 23 September 2026 ·
hard
Maya Joint
AUS5
Maya Joint
#99WTA
1659ELO
1657Hard ELO
$937kYTD
$2.3MCAREER
20 yrs · 167 cm · Right-handed
Last 10
WLWLWWLLWW
Back D.
vs
Joint M.

Dayeon Back faces Maya Joint in the Korea Open - Seoul round of 16 on hard. Maya Joint is the paper favourite — ranked #99 — but Dayeon Back rides a 14-match win streak.

Win Probability

Pre-match · updated 09:50 UTC
Back D.50%
Joint M.50%
Toss-up
50–58%
Slight edge
58–67%
Clear favourite
67–80%
Strong favourite
80%+

Toss-up · Too close to call

Calibrated model · 65% favourite accuracy (2025–26, out-of-sample). Probability is a statistical estimate, not a certainty. How it works.

Key context

Common opponents

Last 12 months
No common opponents in the last 12 months.
Includes tour-level, 125s, qualifying and team events (⚑). Walkovers excluded. Describes past results in different contexts — not a prediction.

Umpiry Score

Pre-match
Back D.
7.2
Strong advantageUmpiry ScorePartial · surface data limited
Joint M.
6.3
Marginal edgeUmpiry ScorePartial · surface data limited
Form & Matchup
5.0No prior meetings
H2H
5.0No prior meetings
10.010 of last 10 on hard
Surface form
5.96 of last 10 on hard
10.014-match win streak
Win streak
Fatigue & Travel
7.01 three-setter in 14 days
3-set count
7.01 three-setter in 14 days
Context
5.0Didn't play here last year
Defending pts
5.0Didn't play here last year
Opponent rise
5.0Opponent hot: 10 of last 10

The Umpiry Score combines match-context factors — matchup, form, fatigue, travel and motivation — into a single 0–10 score, updated daily. Read how it works.

39 vs 21 matches

Statistics

This season
Back D.Joint M.
1st serve in·Even
68%
64%
1st serve points won·Slight edge
63%
56%
2nd serve points won·Even
46%
45%
Service points won·Slight edge
58%
52%
Return points won·Slight edge
52%
41%
Break points saved·Slight edge
51%
56%
Aces / match·Slight edge
0.6
1.6
Double faults / match·Clear edge
2.0
2.9

Averages over each player's completed matches in the selected window (39 vs 21). ATP, WTA & Challenger.

Serve vs return

This season
Back D.serving78% hold

wins 62% of points on serve vs Joint M.

Joint M.serving41% hold

wins 46% of points on serve vs Back D.

Serve advantage — Back D.

Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About

Clutch

Under pressure
Back D.Joint M.
Clutch Rating·Dominant
52
77
Break points saved·Dominant
19
76
Break points won·Slight edge
91
99
Deciding sets·Clear edge
93
77
Tiebreaks·
—
—

Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About

Freshness

Recent load
Back D.Joint M.
Freshness·Even
80
77

Back D.: 1 day rest · 1 match, 26 games (7d) · Joint M.: 1 day rest · 1 match, 30 games (7d). Higher means fresher. About

Conditions

Weather forecast
26°CClear
Wind 3 km/hHumidity 57%

Head to head

No previous meetings on record.

Draw