1999 Gerry Weber Open – Singles

Yevgeny Kafelnikov was the defending champion, but did not take part in 1999.

Seeds
• # 🇦🇺 Patrick Rafter (second round)

• # 🇪🇸 Carlos Moyá (semifinals)

• # Richard Krajicek (first round)

• # 🇺🇸 Andre Agassi (withdrew)

• # 🇪🇸 Felix Mantilla (first round)

• # 🇩🇪 Tommy Haas (quarterfinals)

• # 🇩🇪 Nicolas Kiefer (champion)

• # 🇫🇷 Jérôme Golmard (first round)