1999 Grand Prix Hassan II – Singles

Andrea Gaudenzi was the defending champion, but did not participate this year.

Alberto Martín won the title, defeating Fernando Vicente 6–3, 6–4 in the final.

Seeds
• # 🇦🇹 Thomas Muster (first round)

• # 🇧🇷 Fernando Meligeni (second round)

• # 🇪🇸 Fernando Vicente (final)

• # 🇲🇦 Karim Alami (first round)

• #🇪🇸 Albert Portas (quarterfinals)

• #🇦🇹 Stefan Koubek (quarterfinals)

• #🇪🇸 Alberto Martín (champion)

• #🇦🇷 Hernán Gumy (first round)