Lulu Sun vs Arianne HartonoJinan 125 Round of 16

Jinan 125 · CHALLENGER · Round of 16
#112WTA
1637ELO
1654Hard ELO
25 yrs · Left-handed
Last 10 · pre-match
LWLLWLLLWW
0 — 0
Sets
Monday, 13 October 2025
hard
#334WTA
1453ELO
1436Hard ELO
30 yrs · Right-handed
Last 10 · pre-match
LWLLWWLWLW
Sun L.
6-1 6-2
Hartono A.
Sun L.
662
Hartono A.
12

Lulu Sun defeated Arianne Hartono 6-1 6-2 in the Jinan 125 round of 16 on hard. The result followed the form book — Lulu Sun came in ranked #112.

Key context

Head to head

No previous meetings on record.

Serve vs return

This season
Sun L.serving66% hold

wins 57% of points on serve vs Hartono A.

Hartono A.serving61% hold

wins 55% of points on serve vs Sun L.

Baseline battle — serve is shaky, expect plenty of breaks

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

Serve & return on hard

Sun L.Hartono A.
59
Serve
0
Return

Per-surface Serve / Return Rating (0–100, percentile within the hard field, opponent-adjusted over 52 weeks). About

Statistics

This season
1st serve in·Even
56%
57%
1st serve points won·Slight edge
70%
64%
2nd serve points won·Even
48%
44%
Service points won·Slight edge
60%
55%
Return points won·Even
40%
43%
Break points saved·Slight edge
60%
55%
Aces / match·Clear edge
5.4
2.8
Double faults / match·Clear edge
3.5
4.8

Averages over each player's completed matches in the selected window (67 vs 52). ATP, WTA & Challenger.

Clutch

Under pressure
Clutch Rating·Dominant
72
27
Break points saved·Dominant
94
47
Break points won·Dominant
52
81
Deciding sets·Dominant
90
26
Tiebreaks·
78

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

Umpiry Score

Pre-match
7.5
Dominant favouriteUmpiry Score
3.4
Heavy underdogUmpiry Score
  • Recent retirement (−1.5)
Form & Matchup
8.0+219 Hard Elo edge
Surface ELO
2.0Hard Elo 1436
7.9Overall Elo 1637
ELO gap
2.1Overall Elo 1453
5.0No prior meetings
H2H
5.0
7.9
Surface form
3.6
0.0
Win streak
Fatigue & Travel
7.0
3-set count
Context
5.0
Defending pts
5.0

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.

Freshness

Recent load
Freshness·
100

Sun L.: 17 days rest. Higher means fresher. About

Conditions

Court speed
Mediumbalanced pace
SlowFast