Mario Mansilla Díez
 Mansilla Díez at the 2026 São Léo Open | |
| Country (sports) |  Spain |
|---|---|
| Born | 12 May 2002 Burgos, Spain |
| Height | 1.80 m (5 ft 11 in) |
| Plays | Right-handed (two-handed backhand) |
| Coach | Cristiano Oliveira |
| Prize money | US $54,226 |
| 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. 1,697 (25 May 2026) |
| Doubles | |
| Career record | 0–0 (at ATP Tour level, Grand Slam level, and in Davis Cup) |
| Career titles | 2 Challenger, 7 ITF |
| Highest ranking | No. 152 (25 May 2026) |
| Current ranking | No. 152 (25 May 2026) |
| Last updated on: 25 May 2026. | |
Mario Mansilla Díez (born 12 May 2002) is a Spanish tennis player. Mansilla Díez has a career high ATP singles ranking of No. 816 achieved on 26 September 2022 and a career high ATP doubles ranking of No. 152 achieved on 25 May 2026.[1]
Mansilla Díez has won one ATP Challenger doubles title.