Ayaka Koga
2021
2020
| J5 ISTANBUL-4 | 1R | |
| J4 ISTANBUL-5 | 1R | |
| J4 ANTALYA-5 | 1R | |
| J3 AUCKLAND | 1R | |
| J4 CHRISTCHURCH | [12] | 3R |
| J4 WELLINGTON-2 | [11] | 3R |
2019
| J2 NAGOYA | 1R | |
| JAOSAKA | 1R | |
| J4 MIKICITY-2 | 1R | |
| J5 NOUMEA-2 | [7] | Semi |
| J5 NOUMEA | [7] | Semi |
2018
| J2 NAGOYA | 2R | |
| J500OSAKA | 1R | |
| J4 HYOGO | 1R | |
| J4 CHRISTCHURCH | 1R |
Nation
JPN
Generation
Born in 2004 (21-22 years old)
Year-end Junior World Ranking
- Year-end 2021 1171th
- Year-end 2020 1045th
- Year-end 2019 1314th
- Year-end 2018 1251th
Match Details
J5 BUCHAREST
| W | 2R | Alexia Iulia Marginean | 6-1 6-3 |
| L | 3R | Bianca Bulat | 6-1 4-6 1-6 |
J3 TASHKENT-2
| L | 1R | Leyla Nilufer Elmas | 5-7 2-6 |
J4 TASHKENT
| L | 1R | Anna Khaykis | 5-7 0-6 |
J5 SKOPJE
| W | 1R | Iva Kuzmanoska | 6-4 6-1 |
| L | 2R | Jana Stojanova | 0-6 0-6 |
J4 SKOPJE
| W | 1R | Simona Angelova | 6-2 6-2 |
| L | 2R | Denislava Glushkova | 1-6 2-6 |
J5 NIS
| L | 1R | Olga Molchanova | 4-6 3-6 |
J5 SUBOTICA
| W | 1R | Aya Orenstain | 4-0 4-1 |
| L | 2R | Ida Johansson | 1-6 6-7 |
J5 ISTANBUL-4
| L | 1R | Ranah Akua Stoiber | 1-6 1-6 |
J4 ISTANBUL-5
| L | 1R | Ada Pinara Karabacak | 6-3 6-7 0-6 |
J4 ANTALYA-5
| L | 1R | Melisa Senli | 2-6 1-6 |
J3 AUCKLAND
| L | 1R | Abby Mason | 2-6 2-6 |
J4 CHRISTCHURCH
| W | 1R | Antonia Lawson | 6-2 6-2 |
| W | 2R | Renee Zhang | 6-1 7-6 |
| L | 3R | Sydney Stone | 6-7 1-6 |
J4 WELLINGTON-2
| W | 1R | Taleia Tuatao | 6-2 6-2 |
| W | 2R | Ema Miyaura | 6-3 7-5 |
| L | 3R | Li Hsin Lin | 4-6 1-6 |
J2 NAGOYA
| L | 1R | Sarasa Kaneko | 2-6 6-7 |
JAOSAKA
| L | 1R | Charlotte Kempenaers-Pocz | 4-6 7-6 4-6 |
J4 MIKICITY-2
| L | 1R | Zongyu Li | 2-6 2-6 |
J5 NOUMEA-2
| W | 2R | Noelle Vivian Faber | 6-0 6-0 |
| W | 3R | Saoirse Breen | 6-1 6-4 |
| W | QF | Clara Cwajgenbaum | 6-4 6-2 |
| L | SF | Koharu Niimi | 3-6 2-6 |
J5 NOUMEA
| W | 1R | Scarlett Perkins | 6-0 6-0 |
| W | 2R | Zorika Morgan | 6-2 6-2 |
| W | QF | Nonno Adegawa | 3-6 7-6 6-4 |
| L | SF | Koharu Niimi | 1-6 3-6 |
J2 NAGOYA
| W | 1R | Sayaka Ishii | 6-4 5-7 7-5 |
| L | 2R | Saki Oyama | 4-6 6-4 1-6 |
J500OSAKA
| L | 1R | Funa Kozaki | 3-6 1-6 |
J4 HYOGO
| L | 1R | Lian Tran | 2-6 1-6 |
J4 CHRISTCHURCH
| L | 1R | Kiana Mokhtari | 4-6 3-6 |
Junior Tennis Database is a site that summarizes the results of ITF junior tennis tournaments.
Number of registered tournaments: 14431, Number of registered players: 7,549, Number of registered results: 449,006