Hikaru Shiraishi vs Jumpei Yamasaki

UMPIRY

M15 Yanagawa CityQuarter-finalHardFri 30 Oct · 11:00

Hikaru Shiraishi(1)ATP #594 · JPN60%

VSSlight edge · Shiraishi H.

Jumpei YamasakiJPN40%

Win probabilityWho is more likely to winSlight edge · Shiraishi H.

60%40%

Shiraishi H. favoured, but within the range where form on the day decides.

Umpiry ScoreMatchup strength, 0–10 · not a probability

Shiraishi H.3.7/10

Heavy underdogBased on 5/6 signal groups5/6

Yamasaki J.4.2/10

Heavy underdogBased on 5/6 signal groups5/6

Why

Surface form4 of last 10 on hardAgainst the prediction · Yamasaki J.

Recent runLost last 4Informative

Head-to-headLeads 3–1 on hardSupports Shiraishi H.

This eventDidn't play here last yearBoth players

ELO1 642

Hard ELO1 619

Last 105–5

Age26

Height168 cm

PlaysRight

EarningsCareer $76K2026 $11K

ELO1 614

Hard ELO1 598

Last 105–5

Age29

Height180 cm

PlaysRight

EarningsCareer $84K2026 $4K

Hikaru Shiraishi faces Jumpei Yamasaki in the M15 Yanagawa City quarter-final on hard. Hikaru Shiraishi holds the paper edge — leading the head-to-head 3–1. Recent hard form is closely matched.

Key context

Last match: Hikaru Shiraishi advanced when Y. Tanaka retired.
Last match: Jumpei Yamasaki dropped just 5 games past N. Koizumi.
Head-to-head: Hikaru Shiraishi leads the head-to-head 3–1. Last met at M15 Osaka 2 2025.

Common opponents

0 shared · last 12 months

No common opponents in the last 12 months. Surface form and ELO carry more weight here.

Head-to-head

4 meetings · Shiraishi H. leads 3–1

Yamasaki J.April 2025M15 Osaka 2Hard6-7(7) 7-6(2) 3-0
Shiraishi H.March 2025M15 Nishi-Tokyo 1Hard7-5 6-3
Shiraishi H.December 2023M15 Yanagawa 1Hard6-3 6-4
Shiraishi H.November 2023M15 Kuching 1Hard7-5 6-1

Evidence

Shiraishi H.Yamasaki J.

FormLast 10 matches each · 2026

Win–loss5–55–5

Season win rate45% (14–17)50% (5–5)

RatingUmpiry ELO

Overall ELO16421614

Hard-court ELO16191598

Serve vs returnLast 23 vs 8 matches

1st-serve points won67%62%

Return points won36%39%

Aces / match2.24.8

ClutchLast 23 vs 8 matches

Break points saved58%65%

Draw

Odds

Conditions

11:00 local

SurfaceHard

Forecast21°C · Drizzle

Wind11 km/h

Humidity82%

Cite this

Umpiry, "Hikaru Shiraishi vs Jumpei Yamasaki — M15 Yanagawa City Quarter-final", https://umpiry.com/match/2026-10-30/shiraishi-vs-yamasaki-m15-yanagawa-city-qf?utm_source=cite (as of 30 October 2026).