Luca Castelnuovo
Luca Castelnuovo is a Swiss tennis player. Castelnuovo has a career high ATP singles ranking of No. 400 achieved on 3 November 2025 and a career high doubles ranking of No. 267 achieved on 11 July 2022.
Castelnuovo has won 3 ATP Challenger doubles titles.
ATP Challenger Tour finals
Doubles: 3 (3 titles)
| Result | W–L | Date | Tournament | Tier | Surface | Partner | Opponents | Score |
| Win | 1–0 | [2021 Dutch Open – Doubles|] | Amersfoort, Netherlands | Challenger | Clay |  |