Rei Sakamoto vs Steven Diez — Heilbronn CH Qualifying Round 1

Heilbronn CH · CHALLENGER · Qualifying Round 1
JPN4
Rei Sakamoto
#150ATP
1608ELO
1518Clay ELO
$233kYTD
$492kCAREER
20 yrs · 193 cm · Right-handed
Last 10 · pre-match
LWLWWLLWWW
2 — 1
Sets
Monday, 2 June 2025
clay
CAN
Steven Diez
#1565ATP
35 yrs · 175 cm · Right-handed
Last 10 · pre-match
LLLWWLWWWL
Sakamoto R.
4-6 6-0 6-3
Diez S.
Sakamoto R.
4662
Diez S.
6031

Rei Sakamoto defeated Steven Diez 4-6 6-0 6-3 in the Heilbronn CH qualifying round 1 on clay. The result followed the form book — Rei Sakamoto came in ranked #150.

Key context

Head to head

No previous meetings on record.

Serve vs return

This season
Sakamoto R.serving81% hold

wins 64% of points on serve vs Diez S.

Diez S.serving70% hold

wins 58% of points on serve vs Sakamoto R.

Serve advantage — Sakamoto R.

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

Statistics

This season
Sakamoto R.Diez S.
1st serve in·Even
63%
61%
1st serve points won·Slight edge
73%
62%
2nd serve points won·Even
51%
52%
Service points won·Slight edge
65%
58%
Return points won·Even
37%
37%
Break points saved·Even
61%
57%
Aces / match·Dominant
6.9
1.4
Double faults / match·Even
2.1
2.4

Averages over each player's completed matches in the selected window (87 vs 7). ATP, WTA & Challenger.

Clutch

Under pressure
Sakamoto R.Diez S.
Clutch Rating·Dominant
49
4
Break points saved·Dominant
87
48
Break points won·Clear edge
8
31
Deciding sets·Dominant
93
3
Tiebreaks·Clear edge
23
8

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

Umpiry Score

Pre-match
Sakamoto R.
6.1
Even matchUmpiry ScorePartial · surface data limited
Diez S.
4.3
Heavy underdogUmpiry ScorePartial · surface data limited
  • Extended break: 42 days (−0.7)
Form & Matchup
5.0No prior meetings
H2H
5.0
Surface form
0.7
0.0Lost last 4
Win streak
0.0Lost last 3
Fatigue & Travel
9.1
Minutes 14d
8.0
Prev. match
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
Sakamoto R.Diez S.
Freshness·
94
—

Sakamoto R.: 10 days rest · 2 matches (14d). Higher means fresher. About

Conditions

Court speed
Slowlow bounce, long rallies
SlowFast
Q2
Vatutin A.[5]
Brunold M.[7]
6-37-64
Wiskandt M.[12]
Maestrelli F.[1]
6-36-4
Broska F.
Handel T.
6-36-1
Sakamoto R.[4]
Rosenkranz M.[11]
7-656-3
Squire H.[3]
Agwi M.
3-66-16-4
Topo M.[8]
Masur D.
6-47-65
Q1
Squire H.[3]
Sperle J.
6-16-3
Brunold M.[7]
Iannaccone F.
6-16-2
Vatutin A.[5]
Tsitsipas P.
6-46-3
Rosenkranz M.[11]
Stebe C.
6-46-4
Sakamoto R.[4]
Diez S.
4-66-06-3
Wiskandt M.[12]
Sanchez Martinez B.
6-37-5
Handel T.
Ymer E.[2]
6-46-3
Broska F.
Strombachs R.[10]
W/O
Agwi M.
Zapata Miralles B.[9]
7-54-1
Maestrelli F.[1]
Orlov V.
6-46-2
Masur D.
Michalski D.[6]
6-26-2
Topo M.[8]
Haase R.
6-47-63