TennisJack
Sign in Start free App Dashboard
TJPlayer research cockpit

Rira Kosaka

TennisJack analysis

Rira Kosaka currently has a early TennisJack sample of 16 completed matches, with a 50.0% win rate in the loaded match history. The recent form line is 4-6 across the latest 10 completed matches.

Latest rank -
M
Matches16Completed matches
%
Win rate50.0%Across all matches
F
Latest form4-6In latest 10 matches
Performance metrics
Hold Base49.3%
Break Pressure38.7%
Latest form (10 matches)
4-6
W Oldest L 2 L 3 L 4 L 5 W 6 L 7 W 8 L 9 W Latest
Surface profile
Hardcourt outdoor 14 matches · 50.0% WR
CountryPendingCountry not listed
PlayPendingHand not listed
Highest RankPendingSingles high not listed
Age / BirthdayPendingBirthday not listed
Profile intelligence

Ten signals worth watching.

Built from 16 completed TennisJack matches: form, surface, odds, pressure and close-set behavior. The full match log stays below for audit.

01

Player DNA

Quick fingerprint from starts, service base, return bite and decider exposure.

Balanced starts Break-heavy player Close-set risk
Set 1 punch50.0%
Service shield49.3%
Return bite38.7%
Decider risk37.5%
02

Favorite / Underdog Split

How the player behaves when priced as market favorite versus outsider.

Favorite 0.0% 0-2 - 2 matches Avg odds 1.52 | 1+ set 50.0%
Underdog 25.0% 1-3 - 4 matches Avg odds 4.17 | 1+ set 50.0%
03

First Set Personality

Shows whether the player starts cleanly, breaks first, or survives early pressure.

Set 1 win50.0%
Breaks first S145.5%
Broken first S154.5%
Recovers S133.3%
04

Break Pressure Profile

Return damage versus service leakage, built from set-level break counters.

Avg breaks3.38
Avg broken4.00
Balance-0.62
Clean service matches31.2%
3+ breaks produced50.0%
Set 2 win50.0%
05

Clean Win / Comeback Index

Separates smooth 2-0 wins from matches where the player had to repair damage.

50.0%Clean 2-0 share among wins
Clean 2-0 wins4
Comeback signals8
Lost set 1, won match1
Comeback index50.0%
06

Surface Edge

Where the profile is most trustworthy and where the win rate really travels.

Primary surfaceHardcourt outdoor
Primary record7-7
Primary WR50.0%
Best surfaceUnknown 100.0%
Hardcourt outdoor7-750.0%
Unknown1-0100.0%
Carpet indoor0-10.0%
07

Odds Value Pulse

Shows whether the player wins as expected or creates value at outsider prices.

Avg win odds4.33
Avg loss odds3.08
Biggest win odds4.33
2.00+ odds WR25.0%
2.00+ sample4
Odds sample6
08

Decider Profile

How often matches become complicated, and whether the player survives the third set.

Three-set share37.5%
Decider record3-3
Set 3 win50.0%
After losing S112.5%
09

Close Set Risk

Tie-break and 7-5 / 7-6 pressure profile, useful for spotting fragile edges.

Close sets9-6
Close-set WR60.0%
Tie-breaks1-1
Matches with tight set10
10

Momentum Trend

Compares the latest 5 matches with the previous 10 so form shifts are visible immediately.

Stable form · 1 wins running
W oldest L 2 L 3 L 4 L 5 W 6 L 7 W 8 L 9 W latest
Latest 5 3-2 60.0% WR
Trend delta +10.0% latest vs previous sample
Match log

All Rira Kosaka matches in the TennisJack sample.

Scan date, tournament, surface, players, odds, final score, result and service-return indicators from completed matches.

Open Player Research
Win
14.07.2026
W15 LuanSurface pending
Rira Kosaka
vs
Liuyan An
1.30
3.40
6-4 6-2
Hold
66.7%
Break
66.7%
Loss
25.06.2026
W15 SapporoHardcourt outdoor
Rira Kosaka
vs
Ying Zhang
3.75
1.25
4-6 7-5 4-6
Hold
50.0%
Break
43.8%
Loss
13.05.2026
W35 AndongHardcourt outdoor
Rira Kosaka
vs
Gaeul Jang
3.40
1.30
2-6 3-6
Hold
50.0%
Break
11.1%
Loss
22.04.2026
W35 MiyazakiHardcourt outdoor
Rira Kosaka
vs
Elena Micic
7.50
1.07
6-2 3-6 4-6
Hold
53.9%
Break
42.9%
Win
13.08.2025
UTR Pro Yokohama WomenHardcourt outdoor
Ran Wakana
vs
Rira Kosaka
-
-
4-6 6-0 3-6
Hold
-
Break
-
Loss
22.05.2025
ITF W15 FukuiHardcourt outdoor
Nao Nishino
vs
Rira Kosaka
1.62
2.20
6-1 5-1
Hold
28.6%
Break
0.0%
Loss
14.05.2025
ITF W15 ToyamaHardcourt outdoor
Yuka Naito
vs
Rira Kosaka
2.38
1.53
6-1 2-6 6-2
Hold
58.3%
Break
18.2%