Alexander Blockx
| Country (sports) | Belgium |
|---|---|
| Residence | Antwerp |
| Born | 8 April 2005 Antwerp, Belgium |
| Height | 191 cm (6 ft 3 in) |
| Plays | Right-handed |
| Coach | Philippe Cassiers |
| Prize money | US $ 272,450 |
| Singles | |
| Career record | 0–6 (at ATP Tour level, Grand Slam level, and in Davis Cup) |
| Career titles | 0 |
| Highest ranking | No. 140 (16 June 2025) |
| Current ranking | No. 140 (16 June 2025) |
| Grand Slam singles results | |
| Australian Open | Q1 (2024, 2025) |
| French Open | Q1 (2025) |
| Doubles | |
| Career record | 0–2 (at ATP Tour level, Grand Slam level, and in Davis Cup) |
| Highest ranking | No. 634 (24 February 2025) |
| Current ranking | No. 646 (16 June 2025) |
| Team competitions | |
| Davis Cup | 0–1 |
| Last updated on: 16 June 2025. | |
Alexander Blockx (born 8 April 2005) is a Belgian tennis player. He has a career-high ATP singles ranking of world No. 140, achieved on 16 June 2025 and a doubles ranking of No. 634, achieved on 24 February 2025. He is currently the No. 4 player from Belgium.