| Doubles | |
|---|---|
| 1999 Grand Prix Hassan II | |
| Champions | [1] |
| Runners-up | |
| Score | 6–2, 6–3 |
Andrea Gaudenzi and Diego Nargiso were the defending champions, but did not participate this year.
Fernando Meligeni and Jaime Oncins won in the final 6–2, 6–3, against Massimo Ardinghi and Vincenzo Santopadre.
Cristian Brandi / Massimo Bertolini (semifinals)
Tomáš Cibulec / 
Aleksandar Kitinov (quarterfinals)
Juan Ignacio Carrasco / Jairo Velasco Jr. (quarterfinals)
Fernando Meligeni / Jaime Oncins (champions)| First round | Quarterfinals | Semifinals | Final [1] | ||||||||||||||||||||||||
| 1 | 6 | 6 | |||||||||||||||||||||||||
| 2 | 4 | 1 | 6 | 6 | |||||||||||||||||||||||
| 4 | 7 | 4 | WC | 3 | 4 | ||||||||||||||||||||||
| WC | 6 | 5 | 6 | 1 | 2 | 2 | |||||||||||||||||||||
| 4 | 6 | 6 | 4 | 6 | 6 | ||||||||||||||||||||||
| 2 | 4 | 4 | 7 | 6 | |||||||||||||||||||||||
| Q | 6 | 6 | 6 | Q | 6 | 3 | |||||||||||||||||||||
| 3 | 7 | 3 | 4 | 6 | 6 | ||||||||||||||||||||||
| 1 | 7 | 2 | 2 | 3 | |||||||||||||||||||||||
| WC | 6 | 6 | 6 | WC | 6 | 3 | 6 | ||||||||||||||||||||
| 4 | 4 | 3 | 4 | 6 | 4 | ||||||||||||||||||||||
| 3 | 6 | 6 | WC | 1 | 4 | ||||||||||||||||||||||
| WC | 3 | 4 | 6 | 6 | |||||||||||||||||||||||
| 6 | 6 | 6 | 6 | ||||||||||||||||||||||||
| 3 | 4 | 2 | 4 | 4 | |||||||||||||||||||||||
| 2 | 6 | 6 | |||||||||||||||||||||||||
Pete Sampras defeated MaliVai Washington in the final, 6–3, 6–2 to win the men's singles tennis title at the 1993 Miami Open.
Tomás Carbonell won in the final 7–6(14–12), 5–7, 6–2 against Christian Miniussi.
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.
Andrea Gaudenzi was the defending champion, but did not participate this year.
Mariano Puerta was the defending champion but did not compete that year.
David Adams and John-Laffnie de Jager were the defending champions but they competed with different partners that year, Adams with Andrei Olhovskiy and de Jager with Jason Weir-Smith.
Mahesh Bhupathi and Andrew Kratzmann were the defending champions but only Kratzmann competed that year with Chris Haggard.
Andy Roddick was the defending champion but lost in the third round to Fernando Meligeni.
Fernando Meligeni and Jaime Oncins were the defending champions, but did not participate this year.
Pablo Albano and Daniel Orsanic were the defending champions, but did not participate together this year. Albano did not participate this year. Orsanic partnered Jaime Oncins, losing in the quarterfinals.
Gustavo Kuerten and Fernando Meligeni were the defending champions. Kuerten did not participate this year. Meligeni partnered Filippo Messori, losing in the quarterfinals.
Gustavo Kuerten and Fernando Meligeni were the defending champions, but Kuerten did not participate this year. Meligeni partnered Luis Lobo, losing in the quarterfinals.
Pablo Albano and David Engel were the defending champions, but did not participate this year.
Thomas Muster was the two-time defending champion and successfully defended his title, defeating Fernando Meligeni in the final, 7–6(7–4), 7–5.
Lucas Arnold Ker and Jaime Oncins win the title by defeating Marc-Kevin Goellner and Eric Taino 6–4, 7–6(7–1) in the final.
Olivier Delaître and Fabrice Santoro were the defending champions, but both players decided to rest after competing in the quarterfinals of the Davis Cup. However, Santoro competed in the singles tournament, losing in first round to Jiří Novák.
Libor Pimek and Byron Talbot were the defending champions, but lost in the second round to tournament winners Gustavo Kuerten and Fernando Meligeni.
Gustavo Kuerten and Fernando Meligeni were the defending champions, but Meligeni did not compete this year. Kuerten teamed up with Jaime Oncins and lost in quarterfinals to tournament runners-up Aleksandar Kitinov and Eric Taino.
Michael Chang was the defending champion, but did not compete this year.
In the first edition of the tournament, Leonardo Lavalle and Jaime Oncins won the title by defeating Horacio de la Peña and Jorge Lozano 7–6, 6–4 in the final.
