| 1999 Grand Prix Hassan II | |
|---|---|
| Date | 22–29 March |
| Edition | 15th |
| Category | World Series |
| Draw | 32S / 16D |
| Prize money | $215,000 |
| Surface | Clay / outdoor |
| Location | Casablanca, Morocco |
| Champions | |
| Singles | |
 Alberto Martín[1] | |
| Doubles | |
 Fernando Meligeni / Jaime Oncins[2] | |
The 1999 Grand Prix Hassan II was an Association of Tennis Professionals tennis tournament held in Casablanca, Morocco. It was the 15th edition of the Grand Prix Hassan II and was held from March 22 to March 29, 1999.
- ^ "1999 Casablanca – Singles draw". Association of Tennis Professionals (ATP).
- ^ "1999 Casablanca – Doublesdraw". Association of Tennis Professionals (ATP).