Alexander Blockx
| Country (sports) | Belgium |
|---|---|
| Born | 8 April 2005 Antwerp, Belgium |
| Height | 1.93 m (6 ft 4 in) |
| Plays | Right-handed |
| Coach | Philippe Cassiers |
| Prize money | US $922,443 |
| Singles | |
| Career record | 6–10 (at ATP Tour level, Grand Slam level, and in Davis Cup) |
| Career titles | 0 |
| Highest ranking | No. 94 (23 February 2026) |
| Current ranking | No. 94 (23 February 2026) |
| Grand Slam singles results | |
| Australian Open | 1R (2026) |
| French Open | Q1 (2025) |
| Wimbledon | Q3 (2025) |
| US Open | Q2 (2025) |
| Doubles | |
| Career record | 1–3 (at ATP Tour level, Grand Slam level, and in Davis Cup) |
| Highest ranking | No. 467 (10 November 2025) |
| Current ranking | No. 471 (12 January 2026) |
| Team competitions | |
| Davis Cup | 0–1 |
| Last updated on: 12 January 2026. | |
Alexander Blockx (born 8 April 2005) is a Belgian professional tennis player. He has a career-high ATP singles ranking of world No. 94, achieved on 23 February 2026 and a best doubles ranking of No. 467, reached on 10 November 2025. He is currently the No. 3 singles player from Belgium.
Blockx won the boys' singles title at the 2023 Australian Open. He represents Belgium at the Davis Cup.