Nicolas Mejia
2018
| Us Open Junior | [4] | 3R |
| Wimbledon Junior | [5] | Semi |
| Roland Garros Junior | [9] | Quarter |
| Australian Open Junior | [8] | 1R |
2017
Nation
COL
Age
25 years old (born in 2000)
World Ranking
ATP Ranking　301th
Year-end Junior World Ranking
- Year-end 2018 7th
Match Details
2018 Us Open Junior
| W | 1R | Eliot Spizzirri | 7-6 6-2 |
| W | 2R | Keenan Mayo | 6-3 6-3 |
| L | 3R | Taisei Ichikawa | 6-3 5-7 4-6 |
2018 Wimbledon Junior
| W | 1R | Philip Henning | 7-5 7-6 |
| W | 2R | Daniel Michalski | 7-6 6-0 |
| W | 3R | Cannon Kingsley | 7-6 7-5 |
| W | QF | Gilbert Soares Klier Junior | 7-6 7-5 |
| L | SF | Jack Draper | 6-7 7-6 17-19 |
2018 Roland Garros Junior
| W | 1R | Tao Mu | 6-3 6-4 |
| W | 2R | Cannon Kingsley | 1-6 6-4 6-4 |
| W | 3R | Timofei Skatov | 6-1 6-4 |
| L | QF | Chun Hsin Tseng | 2-6 3-6 |
2018 Australian Open Junior
| L | 1R | Matheus Pucinelli De Almeida | 5-7 6-7 |
2017 Us Open Junior
| L | 1R | Duarte Vale | 4-6 4-6 |
2017 Wimbledon Junior
| L | 1R | Alejandro Davidovich Fokina | 4-6 4-6 |
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