Jumpei Yamasaki
2015
2014
| Us Open Junior | [11] | 1R |
| Wimbledon Junior | [15] | 1R |
| Roland Garros Junior | [13] | 2R |
| Australian Open Junior | [14] | 2R |
Nation
JPN
Age
27 years old (born in 1997)
World Ranking
ATP Ranking　1223th
Match Details
2015 Us Open Junior
| W | 1R | Marcelo Tomas Barrios Vera | 2-6 6-4 6-3 |
| L | 2R | Alex De Minaur | 1-6 6-7 |
2015 Wimbledon Junior
| L | 1R | Casper Ruud | 6-7 7-6 3-6 |
2015 Roland Garros Junior
| L | 1R | Tommy Paul | 2-6 6-7 |
2015 Australian Open Junior
| L | 1R | Soonwoo Kwon | 3-6 6-7 |
2014 Us Open Junior
| L | 1R | Lucas Miedler | 7-6 6-4 |
2014 Wimbledon Junior
| L | 1R | Tim Van Rijthoven | 1-6 2-6 |
2014 Roland Garros Junior
| W | 1R | Bogdan Bobrov | 6-3 6-4 |
| L | 2R | Seong Chan Hong | 2-6 6-2 0-6 |
2014 Australian Open Junior
| W | 1R | Gabriel Vellinho Hocevar | 6-1 6-3 |
| L | 2R | Boris Pokotilov | 4-6 6-4 6-8 |
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