Ryotaro Koshiba
2019
| Ai Sugiyama Cup | [7] | Quarter |
| China Junior 2 | 2R |
Nation
JPN
Age
22 years old (born in 2002)
Year-end Junior World Ranking
- Year-end 2020 1139th
- Year-end 2019 1500th
- Year-end 2018 1024th
Match Details
2019 Ai Sugiyama Cup
| 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 |
2019 China Junior 2
| W | 1R | Zhipeng Song | 6-3 6-2 |
| L | 2R | Qian Sun | 4-6 0-6 |
Junior Tennis Database is a site that summarizes the results of ITF junior tennis tournaments.
Number of registered tournaments: 5774, Number of registered players: 3,011, Number of registered results: 222,093