1999 Mercedes Cup – Singles

Gustavo Kuerten was the defending champion, but retired against Magnus Norman in the second round due to fatigue.

Norman went on to win the title, defeating Tommy Haas 6–7(6–8), 4–6, 7–6(9–7), 6–0, 6–3 in the final.

Seeds
All seeds receive a bye into the second round.

• # 🇧🇷 Gustavo Kuerten (second round, retired due to fatigue)

• # 🇪🇸 Carlos Moyá (quarterfinals)

• # Marcelo Ríos (quarterfinals)

• # 🇸🇰 Karol Kučera (third round)

• # 🇪🇸 Àlex Corretja (semifinals)

• # 🇪🇸 Félix Mantilla (second round)

• # 🇩🇪 Tommy Haas (final)

• # 🇸🇰 Dominik Hrbatý (third round)

• # 🇸🇪 Thomas Johansson (second round)

• # 🇪🇨 Nicolás Lapentti (quarterfinals)

• # 🇪🇸 Albert Costa (third round)

• # 🇪🇸 Francisco Clavet (third round)

• # 🇺🇸 Vince Spadea (quarterfinals)

• # 🇦🇷 Mariano Zabaleta (second round)

• # 🇲🇦 Younes El Aynaoui (second round)

• # 🇧🇷 Fernando Meligeni (third round)