Name: Ayumi Koshiishi
Country: Japan
Birthdate: 28.07.00, 18 years
WTA ranking: 619
TOP ranking's position: 611 (14.01.19, 2300 points)
Points: 23
Matches total: 101
Win: 57
%: 56.44 %
Country: Japan
Birthdate: 28.07.00, 18 years
WTA ranking: 619
TOP ranking's position: 611 (14.01.19, 2300 points)
Points: 23
Matches total: 101
Win: 57
%: 56.44 %
| year | summary | Hard | Clay | I. hard | Carpet | Grass | Acrylic |
| 2019 | 4/4 | 0/0 | 4/3 | 0/1 | 0/0 | 0/0 | 0/0 |
| 2018 | 30/21 | 23/18 | 0/0 | 0/0 | 7/3 | 0/0 | 0/0 |
| 2017 | 13/12 | 7/5 | 0/0 | 0/1 | 6/6 | 0/0 | 0/0 |
| 2016 | 10/7 | 1/3 | 0/0 | 2/1 | 7/3 | 0/0 | 0/0 |
| TOTAL | 57/44 | 31/26 | 4/3 | 2/3 | 20/12 | 0/0 | 0/0 |
| perc. % | 56.44 % | 54.39 % | 57.14 % | 40 % | 62.5 % | 0 % | 0 % |
Ayumi Koshiishi / Fixtures
| no matches found |
Ayumi Koshiishi / Latest Scores
| 13.02.19 | 1st round | Sadafmoh Tolibova | Ayumi Koshiishi | 4-6, 6-1, 6-1 |  | match details |  W15 Shymkent | I. hard |
| 07.02.19 | 2nd round | Daniella Medvedeva | Ayumi Koshiishi | 6-3, 6-1 | | match details |  W15 Palmanova | Clay |
| 05.02.19 | 1st round | Ayumi Koshiishi | Isabel Adrover Gallego | 6-1, 6-2 |  | match details | ||
| 31.01.19 | 2nd round | Claudia Hoste Ferrer | Ayumi Koshiishi | 6-0, 6-2 | | match details | W15 Manacor | Clay |
| 29.01.19 | 1st round | Ayumi Koshiishi | Jazmin Ortenzi | 7-5, 4-6, 6-2 | | match details | ||
| 25.01.19 | 1/4 | Julia Payola | Ayumi Koshiishi | 6-2, 6-2 | | match details | W15 Manacor | Clay |
| 25.01.19 | 2nd round | Ayumi Koshiishi | Jazmin Ortenzi | 6-2, 1-6, 6-2 | | match details | ||
| 22.01.19 | 1st round | Ayumi Koshiishi | Laura Svatikova | 3-6, 7-68, 6-3 | | match details | ||
| 28.10.18 | q 1 | Masa Jovanovic | Ayumi Koshiishi | 7-5, 4-6, 6-4 | | match details |  Canberra | Hard |
| 21.10.18 | q 1 | Marianna Zakarlyuk | Ayumi Koshiishi | 4-6, 6-0, 7-65 | | match details | Bendigo | Hard |
| 17.10.18 | 1st round | Miyabi Inoue | Ayumi Koshiishi | 6-2, 6-2 | | match details |  Hamamatsu | Carpet |
| 15.10.18 | qual. | Ayumi Koshiishi | Karen Tsutsumi | 6-2, 6-1 | | match details | ||
| 14.10.18 | q 1 | Ayumi Koshiishi | Yui Chikaraishi | 7-61, 6-2 | | match details | ||
| 14.10.18 | q 2 | Ayumi Koshiishi | Mayuka Aikawa | 6-3, 6-2 | | match details | ||
| 11.10.18 | 2nd round | Michika Ozeki | Ayumi Koshiishi | 6-2, 6-0 | | match details | Makinohara | Carpet |
| 09.10.18 | 1st round | Ayumi Koshiishi | Kisa Yoshioka | 7-5, 6-3 | | match details | ||
| 30.08.18 | 2nd round | Ayano Shimizu | Ayumi Koshiishi | 7-5, 6-3 | | match details | Nanao | Carpet |
| 29.08.18 | 1st round | Ayumi Koshiishi | Tori Kinard | 7-5, 5-7, 6-4 | | match details | ||
| 27.08.18 | qual. | Ayumi Koshiishi | Yu-Ting Hsieh | 6-0, 6-0 | | match details | ||
| 27.08.18 | q 2 | Ayumi Koshiishi | Ayaka Ozeki | 4-6, 6-3, 6-3 | | match details | ||
| 20.08.18 | qual. | Nagi Hanatani | Ayumi Koshiishi | 6-2, 7-60 | | match details | Tsukuba | Hard |
| 19.08.18 | q 1 | Ayumi Koshiishi | Ange Oby Kajuru | 6-1, 6-4 | | match details | ||
| 11.08.18 | q 1 | Punnin Kovapitukted | Ayumi Koshiishi | 6-2, 6-2 | | match details |  Nonthaburi | Hard |
| 06.08.18 | 1st round | Lou Brouleau | Ayumi Koshiishi | 6-1, 6-3 | | match details | Nonthaburi | Hard |
| 05.08.18 | qual. | Ayumi Koshiishi | Michika Ozeki | 6-70, 7-5, 6-3 | | match details | ||
| 04.08.18 | q 1 | Ayumi Koshiishi | Jia Qi Ren | 6-1, 1-6, 6-2 | | match details | ||
| 26.07.18 | 2nd round | Hua-Chen Lee | Ayumi Koshiishi | 6-3, 6-0 | | match details | .png){kind=small} Taipei | Hard |
| 24.07.18 | 1st round | Ayumi Koshiishi | Ting-Pei Chang | 6-2, 6-1 | | match details | ||
| 13.07.18 | 1/2 | Sakura Hosogi | Ayumi Koshiishi | 3-6, 6-4, 6-3 | | match details |  Hong Kong | Hard |
| 12.07.18 | 1/4 | Ayumi Koshiishi | Zeel Desai | 7-5, 6-1 | | match details | ||
| 11.07.18 | 2nd round | Ayumi Koshiishi | Prerna Bhambri | 6-2, 6-2 | | match details | ||
| 10.07.18 | 1st round | Ayumi Koshiishi | Haine Ogata | 6-1, 6-4 | | match details | ||
| 10.06.18 | qual. | Deria Nur Haliza | Ayumi Koshiishi | 1-6, 6-4, 6-3 | | match details |  Singapore | Hard |
| 09.06.18 | q 1 | Ayumi Koshiishi | Greeshma Sai Vignatha Kamisetty | 6-0, 6-0 | | match details | ||
| 04.06.18 | 1st round | Hiroko Kuwata | Ayumi Koshiishi | 7-63, 6-710, 6-4 | | match details | Singapore | Hard |
| 03.06.18 | qual. | Ayumi Koshiishi | Khee Yen Wee | 6-3, 6-1 | | match details | ||
| 02.06.18 | q 1 | Ayumi Koshiishi | Sarah Pang | 6-0, 6-0 | | match details | ||
| 24.05.18 | 2nd round | Ya-Hsuan Lee | Ayumi Koshiishi | 6-4, 6-3 | | match details |  Changwon | Hard |
| 23.05.18 | 1st round | Ayumi Koshiishi | Dabin Kim | 6-1, 6-3 | | match details | ||
| 22.05.18 | qual. | Ayumi Koshiishi | Chang Liu | 6-1, 6-3 | | match details | ||
| 21.05.18 | q 2 | Ayumi Koshiishi | Jeong Moon | 6-3, 6-2 | | match details | ||
| 20.05.18 | q 1 | Ayumi Koshiishi | Hyojin Kong | 6-3, 6-3 | | match details | ||
| 16.05.18 | 1st round | Na-Lae Han | Ayumi Koshiishi | 6-1, 6-73, 6-2 | | match details | Incheon | Hard |
| 15.05.18 | qual. | Ayumi Koshiishi | Eunhye Lee (2000) | 6-3, 3-6, 6-1 | | match details | ||
| 14.05.18 | q 2 | Ayumi Koshiishi | Seo-Kyung Kang | 6-0, 6-2 | | match details | ||
| 13.05.18 | q 1 | Ayumi Koshiishi | Freya Christie | 6-4, 6-2 | | match details | ||
| 09.05.18 | 1st round | So-Ra Lee | Ayumi Koshiishi | 7-62, 6-3 | | match details | Goyang | Hard |
| 08.05.18 | qual. | Ayumi Koshiishi | Yexin Ma | 6-4, 6-3 | | match details | ||
| 07.05.18 | q 2 | Ayumi Koshiishi | Jin Yoo | 6-3, 6-3 | | match details | ||
| 29.04.18 | q 2 | Tammi Patterson | Ayumi Koshiishi | 6-3, 3-0, Ayumi Koshiishi - retired | | match details | Gifu | Hard |
