Koshiishi - Back
12.06.2019, 03:00, Gimcheon 2 ITF, 1. round, hard
| Koshiishi Ayumi | 2 : 0 (7-5, 6-2) |
Back Dayeon | ||
|---|---|---|---|---|
![]() |
779. | Singles ranking | 270. | ![]() |
| 28. 7. 2000 | Birthdate | 24. 1. 2002 | ||
| - | Height | - | ||
| - | Weight | - | ||
| right | Plays | right | ||
| - | Turned pro | - | ||
| Surface | Koshiishi Ayumi | Back Dayeon |
|---|---|---|
| Indoors | - | 5/3 |
| Clay | - | 6/5 |
| Grass | - | - |
| Hard | - | 27/7 |
| Not set | - | - |
| Year | Summary | Clay | Hard | Indoors | Grass | Not set |
|---|---|---|---|---|---|---|
| Summary: | 295/180 | 26/15 | 244/143 | 25/22 | - | - |
| 2025 | 33/30 | - | 30/26 | 3/4 | - | - |
| 2024 | 45/31 | 1/1 | 35/25 | 9/5 | - | - |
| 2023 | 50/20 | - | 50/18 | 0/2 | - | - |
| 2022 | 19/12 | - | 16/9 | 3/3 | - | - |
| 2021 | 48/15 | 4/4 | 41/10 | 3/1 | - | - |
| 2020 | 25/9 | 16/5 | 9/4 | - | - | - |
| 2019 | 22/23 | 5/5 | 13/15 | 4/3 | - | - |
| 2018 | 30/21 | - | 30/21 | - | - | - |
| 2017 | 13/12 | - | 13/10 | 0/2 | - | - |
| 2016 | 10/7 | - | 7/5 | 3/2 | - | - |
| Year | Summary | Clay | Hard | Indoors | Grass | Not set |
|---|---|---|---|---|---|---|
| Summary: | 243/108 | 14/10 | 211/91 | 8/4 | - | 10/3 |
| 2026 | 43/15 | 6/5 | 27/7 | 5/3 | - | 5/0 |
| 2025 | 48/26 | - | 45/24 | - | - | 3/2 |
| 2024 | 54/20 | 3/1 | 51/18 | - | - | 0/1 |
| 2023 | 44/15 | - | 42/15 | - | - | 2/0 |
| 2022 | 19/11 | - | 19/11 | - | - | - |
| 2021 | 7/8 | 5/4 | 2/4 | - | - | - |
| 2019 | 18/7 | - | 18/7 | - | - | - |
| 2018 | 6/3 | - | 3/2 | 3/1 | - | - |
| 2017 | 4/3 | - | 4/3 | - | - | - |
Head-to-head: 1 - 2
| Year | Tournament | Match | S | Surface | 1 | 2 | 3 | 4 | 5 | Round |
|---|---|---|---|---|---|---|---|---|---|---|
| 2025 | Andong ITF | Back | 2 | 6 | 6 | R16 | ||||
| Koshiishi | 0 | 0 | 3 | |||||||
| 2024 | Nagpur ITF | Back | 2 | 6 | 6 | R16 | ||||
| Koshiishi | 0 | 0 | 1 | |||||||
| 2019 | Gimcheon 2 ITF | Koshiishi | 2 | 7 | 6 | 1R | ||||
| Back | 0 | 5 | 2 |
Betting odds
| Koshiishi Ayumi | Back Dayeon | |||||||||||||||||||
| bet365 | 2.20
|
1.61
|
||||||||||||||||||
| bwin | 2.05 |
1.62 |
||||||||||||||||||
| Interwetten | 1.95 |
1.65
|
||||||||||||||||||
| Ladbrokes | 2.00 |
1.73 |
||||||||||||||||||
| Average odds | 2.05 |
1.65 |
||||||||||||||||||
No odds
No odds
No odds
Latest matches
- Koshiishi
| Sydney 3 ITF, Q-R16, 17.11.2025 | ||
| Yang - Koshiishi | 2:0 | |
| Sydney 3 ITF, Q-1R, 16.11.2025 | ||
| Koshiishi - Guillen | 2:0 | |
| Brisbane 5 ITF, QF, 14.11.2025 | ||
| Wei - Koshiishi | 2:0 | |
| Brisbane 5 ITF, R16, 13.11.2025 | ||
| Koshiishi - Varaksina | 2:0 | |
| Brisbane 5 ITF, 1R, 11.11.2025 | ||
| Koshiishi - Hule | 2:0 | |
| Toronto ITF, 1R, 28.10.2025 | ||
| Cross - Koshiishi | 2:1 | |
| Saguenay ITF, QF, 24.10.2025 | ||
| Rogers - Koshiishi | 2:0 | |
| Saguenay ITF, R16, 24.10.2025 | ||
| Koshiishi - Chavez | 2:1 | |
| Saguenay ITF, 1R, 21.10.2025 | ||
| Koshiishi - Vagramov | 2:1 | |
| Jinan, Q-R16, 13.10.2025 | ||
| Nugroho - Koshiishi | 2:1 | |
- Back
| Hamburg 4 ITF, R16, 13.08.2026 | ||
| Vladson - Back | 2:0 | |
| Hamburg 4 ITF, 1R, 12.08.2026 | ||
| Back - Vasilescu | 2:0 | |
| Leipzig ITF, 1R, 05.08.2026 | ||
| Paštiková - Back | 2:0 | |
| Hechingen ITF, 1R, 29.07.2026 | ||
| Yao - Back | 2:0 | |
| Horb ITF, F, 26.07.2026 | ||
| Nilsson - Back | 2:0 | |
| Horb ITF, SF, 25.07.2026 | ||
| Back - Glushkova | 1:0 | |
| Horb ITF, QF, 24.07.2026 | ||
| Back - Ebeling Koning | 2:0 | |
| Horb ITF, R16, 23.07.2026 | ||
| Back - Hageman | 2:0 | |
| Horb ITF, 1R, 22.07.2026 | ||
| Back - Simion | 2:0 | |
| Darmstadt ITF, R16, 16.07.2026 | ||
| Herrero Linana - Back | 2:0 | |
This week's tournaments
| Main tournaments | ||||
| Cincinnati | 7 | |||
| Cincinnati WTA | 6 | |||
| Lower level tournaments | ||||
| Cancun challenger | 12 | |||
| Quebec City challenger | 5 | |||
| Kingston challenger | 5 | |||
| Prague 2 challenger | 4 | |||
| Roehampton challenger | 5 | |||
| Sion challenger | 3 | |||
| UTR Pro Tennis Series | 1 | |||
| UTR Pro Tennis Series 3 | 32 | |||
| UTR Pro Tennis Series 5 | 10 | |||
| UTR Pro Tennis Series 9 | 12 | |||
| Kursumlijska Banja 15 ITF | 6 | |||
| Prague 4 ITF | 4 | |||
| Bistrita ITF | 5 | |||
| Erwitte ITF | 4 | |||
| Kraków ITF | 4 | |||
| Verbier ITF | 4 | |||
| UTR Pro Tennis Series 5 | 19 | |||
| UTR Pro Tennis Series 9 | 16 | |||
| Campos Do Jordao ITF | 5 | |||
| Logrono ITF | 5 | |||
| Tianjin 3 ITF | 6 | |||
| Wanfercee-Baulet ITF | 5 | |||
| UTR Pro Match Series | 17 | |||
| UTR Pro Tennis Series | 4 | |||
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