Kaylan Bigun vs Rei Sakamoto — Sumter CH Round of 32

Sumter CH · CHALLENGER · Round of 32
USA
Kaylan Bigun
#507ATP
1302ELO
1275Hard ELO
20 yrs · 183 cm · Left-handed
Last 10 · pre-match
LLLWLLLLWL
2 — 0
Sets
Tuesday, 12 August 2025
hard
JPN
Rei Sakamoto
#150ATP
1608ELO
1589Hard ELO
$233kYTD
$492kCAREER
20 yrs · 193 cm · Right-handed
Last 10 · pre-match
LWLWWLLWWW
Bigun K.
6-3 6-1
Sakamoto R.
Bigun K.
662
Sakamoto R.
310

Kaylan Bigun defeated Rei Sakamoto 6-3 6-1 in the Sumter CH round of 32 on hard. The upset overturned the form book — Rei Sakamoto came in ranked #150.

Key context

Head to head

No previous meetings on record.

Serve vs return

This season
Bigun K.serving73% hold

wins 60% of points on serve vs Sakamoto R.

Sakamoto R.serving86% hold

wins 67% of points on serve vs Bigun K.

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
Bigun K.Sakamoto R.
1st serve in·Slight edge
56%
63%
1st serve points won·Slight edge
67%
73%
2nd serve points won·Slight edge
43%
51%
Service points won·Slight edge
57%
65%
Return points won·Even
37%
37%
Break points saved·Slight edge
55%
61%
Aces / match·Clear edge
4.1
7.0
Double faults / match·Dominant
4.5
2.1

Averages over each player's completed matches in the selected window (25 vs 87). ATP, WTA & Challenger.

Umpiry Score

Pre-match
Bigun K.
4.0
Heavy underdogUmpiry Score
  • Extended break: 22 days (−0.3)
Sakamoto R.
7.5
Dominant favouriteUmpiry Score
Form & Matchup
0.9Hard Elo 1275
Surface ELO
9.1+315 Hard Elo edge
0.9Overall Elo 1302
ELO gap
9.1Overall Elo 1608
5.0No prior meetings
H2H
5.0
3.5
Surface form
6.3
Fatigue & Travel
8.0
Prev. match
6.0
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
Bigun K.Sakamoto R.
Freshness·
—
94

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

Conditions

Court speed
Fastbig serves, short points
SlowFast
Final
Bellucci M.[3]
Shevchenko A.[5]
7-653-1
Semi-finals
Shevchenko A.[5]
Mochizuki S.[7]
4-66-16-1
Bellucci M.[3]
Faria J.[9]
6-06-4
Quarter-finals
Shevchenko A.[5]
Basilashvili N.[6]
3-67-634-1
Faria J.[9]
Lajal M.
5-76-47-68
Bellucci M.[3]
Klein L.[8]
6-46-2
Mochizuki S.[7]
Misolic F.[4]
6-44-66-4
R16
Faria J.[9]
Bigun K.
3-66-04-1
Shevchenko A.[5]
Shimabukuro S.
6-36-3
Misolic F.[4]
Trotter J.
6-37-61
Basilashvili N.[6]
Cassone M.
2-66-36-1
Bellucci M.[3]
Rocha H.
7-656-4
Lajal M.
Bergs Z.[1]
6-46-3
Mochizuki S.[7]
Poling K.
6-36-0
Klein L.[8]
Mccabe J.
7-56-1
R32
Klein L.[8]
Seggerman R.
6-40-0
Mccabe J.
Fearnley J.
3-67-50-0
Bigun K.
Sakamoto R.
6-36-1
Faria J.[9]
Habib H.
6-796-17-5
Mochizuki S.[7]
Rybakov A.
7-57-62
Trotter J.
Landaluce M.
6-46-3
Cassone M.
Blanch D.
7-53-66-3
Shimabukuro S.
Nishioka Y.
6-37-5
Poling K.
Evans D.
1-66-46-4
Rocha H.
Damm M.
3-66-36-4
Basilashvili N.[6]
Eubanks C.
6-33-67-5
Lajal M.
Kirchheimer S.
1-66-37-5