Nicolás Mejía
Nicolás Mejía is a Colombian tennis player.
Mejía has a career high ATP singles ranking of 1416 achieved on 7 May 2018. He also has a career high ATP doubles ranking of 769 achieved on 13 August 2018.
Mejía represents Colombia at the Davis Cup, where he has a W/L record of 0–1.
ITF Futures Finals (1–2)
Singles
| ITF Futures |
| Result | W–L | Date | Tournament | Tier | Surface | Opponent | Score |
| Winner | 1–0 | Niceville, United States | Future | Clay |  Strong Kirchheimer | 6–4, 6–4 | |
| Runner-up | 1–1 | Bucaramanga, Colombia | Future M15 | Clay |  Mauricio Echazú | 6–3, 3–6, 4–6 | |
| Winner | 2–1 | Cancún, Mexico | Future M15 | Hard | Nicolas Moreno de Alboran | 6–2, 7–5 | |
| Winner | 3–1 | Cancún, Mexico | Future M15 | Hard | Gage Brymer | 6–1, 6–2 |
Doubles
| ITF Futures |
| Result | W–L | Date | Tournament | Tier | Surface | Partner | Opponents | Score |
| Runner-up | 0–1 | Boca Raton, United States | Future | Clay |  José Daniel Bendeck | Alejandro Gómez  Roberto Quiroz | 3–6, 6–7 | |
| Runner-up | 0–2 | Cartagena, Colombia | Future | Clay | José Daniel Bendeck |  Facundo Mena  Jorge Montero | 4–6, 6–7 | |
| Winner | 1–2 | Weston, United States | Future | Clay | Sebastian Korda | Harrison Adams Jordi Arconada | 6–3, 4–6, | |
| Runner-up | 0–3 | Antalya, Turkey | Future | Clay | Sebastian Korda |  Vasile-Alexandru Ghilea Mircea-Alexandru Jecan | 6–2, 6–2 | |
| Runner-up | 0–4 | Antalya, Turkey | Future | Clay | Sebastian Korda | Arklon Huertas del Pino Conner Huertas del Pino | 6–7, 6–4, | |
| Winner | 2–4 | Cancún, Mexico | Future M15 | Hard | Axel Geller |  Jody Maginley  Justin Roberts | 6–7, 6–1, |