Katie Boulter vs Himeno Sakatsume — Japan Open - Osaka Round of 32
Why
Surface+196 Hard Elo edgeSupports Boulter K.
Overall ratingOverall Elo 1831Supports Boulter K.
Recent runLost last 2Informative
Head-to-headTrails 0–1 on hardInformative
Long matches1 three-setter in 14 daysSupports Boulter K.
ELO1 867
Hard ELO1 745
Last 103–7
Age30
PlaysRight
EarningsCareer $5.0M2026 $1.0M
ELO1 756
Hard ELO1 693
Last 107–3
Age25
PlaysRight
EarningsCareer $587K2026 $267K
Katie Boulter faces Himeno Sakatsume in the Japan Open - Osaka round of 32 on hard. Katie Boulter is the paper favourite — ranked #54, a roughly 200-point hard Elo advantage — but Himeno Sakatsume has won their only previous meeting. Himeno Sakatsume brings the better recent hard form (7 of 10).
Key context
- Freshness: Katie Boulter comes in with 5 days of rest and 16 games in 14d, vs Himeno Sakatsume's 8 and 86.
- Form trend: Form trajectories diverge: Himeno Sakatsume rising, Katie Boulter cooling.
- Surface form: Katie Boulter 3 of 10, Himeno Sakatsume 7 of 10 on hard recently — Himeno Sakatsume the sharper of late.
Common opponents
6 shared · last 12 monthsBoulter K. and Sakatsume H. faced 6 of the same opponents in the last 12 months. Boulter K. went 3–3 (50%) against them, Sakatsume H. 3–3 (50%). Results against comparable opponents are close (1 : 1 better-results split).
3–350%Boulter K. · better vs 1Record vs common opponents3–350%Sakatsume H. · better vs 1
Vs common opponents · derived from scorelines
7–7Sets6–7
63–59Games57–62
1–0Tiebreaks0–0
1–1Deciding sets1–0
vs Eala A.#19L4-6 1-2Hong Kong · hardL4-6 0-6Manila 125 · hard
vs Paolini J.#33L6-0 3-6 3-6Merida · hardL3-6 1-6BJK Cup Qualifiers · hard
vs Bouzas Maneiro J.#99W7-6 6-4Miami · hardL5-7 2-6Nottingham · grass
Show 3 more ▾Show less ▴
- vs Lee C.#140W6-4 3-6 6-0US Open · hardW6-2 7-5Canberra 125 · hard
- vs Grant T.#151L4-6 2-6Wimbledon · grassW5-7 6-2 6-3US Open · hard
vs Hontama M.#164W6-3 6-4Beijing · hardW6-4 6-2Australian Open · hard
Evidence
Boulter K.Sakatsume H.
FormLast 10 matches each · 2026
Win–loss3–77–3 (ahead)
Season win rate52% (23–21)54% (32–27) (ahead)
RatingUmpiry ELO
Overall ELO1867 (ahead)1756
Hard-court ELO1745 (ahead)1693
Serve vs returnLast 42 vs 53 matches
1st-serve points won66% (ahead)62%
Return points won43%44% (ahead)
Aces / match2.4 (ahead)1.8
ClutchLast 42 vs 53 matches
Break points saved54%56% (ahead)
Draw
Odds
Cite this
Umpiry, "Katie Boulter vs Himeno Sakatsume — Japan Open - Osaka Round of 32", https://umpiry.com/match/2026-10-19/boulter-vs-sakatsume-japan-open-osaka-r32?utm_source=cite (as of 19 October 2026).