Ryotaro Koshiba
2020
2019
| J5 CHIGASAKI | [7] | Quarter |
| JAOSAKA | 1R | |
| J4 MIKICITY-2 | 1R | |
| J4 MIKICITY | 1R | |
| J5 PHNOMPENH-2 | 1R | |
| J4 CAUSEWAYBAY | 2R | |
| J4 SHENZHEN-2 | 2R |
2018
| J2 NAGOYA | 1R | |
| J4 HYOGO-2 | 2R | |
| J4 HYOGO | 1R | |
| J4 JEJU | [4] | 2R |
| J4 CAUSEWAYBAY | 2R |
2017
| J3 PUNE | 1R | |
| J2 NAGOYA | 2R | |
| J500OSAKA | 1R | |
| J4 HYOGO-2 | 1R | |
| J4 HYOGO | 1R | |
| J4 LAUTOKA | [7] | Quarter |
| J4 JEJU | [9] | 3R |
Nation
JPN
Age
23 years old (born in 2002)
Year-end Junior World Ranking
- Year-end 2020 1139th
- Year-end 2019 1500th
- Year-end 2018 1024th
Match Details
J3 SAITAMA
| W | 1R | Prachaya Baibong | 6-1 6-3 |
| L | 2R | Reiya Komagata | 2-6 2-6 |
J5 CHIGASAKI
| W | 1R | Sohma Nakagomi | 4-6 7-6 6-4 |
| W | 2R | Taiyo Kurata | 6-4 2-6 6-4 |
| L | QF | Taiyo Uenoyama | 1-6 2-6 |
JAOSAKA
| L | 1R | Dominic Stricker | 0-6 2-6 |
J4 MIKICITY-2
| L | 1R | Xinmu Zhou | 1-6 4-6 |
J4 MIKICITY
| L | 1R | Yunseok Jang | 4-6 3-6 |
J5 PHNOMPENH-2
| L | 1R | Thai Nguyen Tat | 1-6 6-4 4-6 |
J4 CAUSEWAYBAY
| W | 1R | Guntinun Sootinun-Opart | 6-4 6-1 |
| L | 2R | Wai Yu Kai | 2-6 3-6 |
J4 SHENZHEN-2
| W | 1R | Zhipeng Song | 6-3 6-2 |
| L | 2R | Qian Sun | 4-6 0-6 |
J2 NAGOYA
| L | 1R | Yamato Sueoka | 0-6 3-6 |
J4 HYOGO-2
| W | 1R | Fumiya Yoshino | 6-4 4-6 6-2 |
| L | 2R | Yu Zhang | 0-6 2-6 |
J4 HYOGO
| L | 1R | Tomoya Ikeda | 0-6 1-6 |
J4 JEJU
| L | 2R | Hyunbin Jin | 3-6 6-4 3-6 |
J4 CAUSEWAYBAY
| W | 1R | Chieh Cheng Yu | 6-0 6-4 |
| L | 2R | Ching Ho Sunny Yue | 3-6 4-6 |
J3 PUNE
| L | 1R | Sacchitt Sharrma | 1-6 4-6 |
J2 NAGOYA
| W | 1R | Akanit Pumjit | 6-1 6-3 |
| L | 2R | Seita Watanabe | 2-6 1-6 |
J500OSAKA
| L | 1R | Stefan Storch | 7-5 2-6 3-6 |
J4 HYOGO-2
| L | 1R | Seita Watanabe | 2-6 4-6 |
J4 HYOGO
| L | 1R | Wai Yu Kai | 3-6 4-6 |
J4 LAUTOKA
| W | 2R | Chen Dong | 7-5 3-6 6-2 |
| W | 3R | Kiev Moores | 6-1 6-1 |
| L | QF | Hiroki Sakagawa | 2-6 0-6 |
J4 JEJU
| W | 2R | Joonhyuk Ko | 7-5 6-0 |
| L | 3R | Joonhee Yoon | 1-6 1-6 |
Junior Tennis Database is a site that summarizes the results of ITF junior tennis tournaments.
Number of registered tournaments: 14549, Number of registered players: 7,577, Number of registered results: 451,713