Mario Mansilla Díez
| Country (sports) |  Spain |
|---|---|
| Born | 12 May 2002 Burgos, Spain |
| Height | 1.80 m (5 ft 11 in) |
| Plays | Right-handed (two-handed backhand) |
| Prize money | $29,308 |
| Singles | |
| Career record | 0–0 (at ATP Tour level, Grand Slam level, and in Davis Cup) |
| Career titles | 0 |
| Highest ranking | No. 816 (26 September 2022) |
| Current ranking | No. 1966 (30 June 2025) |
| Doubles | |
| Career record | 0–0 (at ATP Tour level, Grand Slam level, and in Davis Cup) |
| Career titles | 1 Challenger, 7 ITF |
| Highest ranking | No. 311 (23 June 2025) |
| Current ranking | No. 327 (30 June 2025) |
| Last updated on: 5 July 2025. | |
Mario Mansilla Díez (born 12 May 2002) is a Spanish tennis player.
Mansilla Díez has a career high ATP singles ranking of 816 achieved on 26 September 2022. He also has a career high ATP doubles ranking of 311 achieved on 23 June 2025.[1]
Mansilla Díez has won one ATP Challenger doubles title at the 2025 Internationaux de Tennis de Troyes.