1998 BMW Open – Singles

Mark Philippoussis was the defending champion, but lost in the second round this year.

Thomas Enqvist won the title, defeating Andre Agassi 6–7(4–7), 7–6(8–6), 6–3 in the final.

Seeds

 * 1) 🇬🇧 Greg Rusedski (first round)
 * 2) 🇸🇪 Jonas Björkman (quarterfinals)
 * 3) 🇧🇷 Gustavo Kuerten (second round)
 * 4) 🇬🇧 Tim Henman (second round)
 * 5) 🇦🇺 Mark Philippoussis (second round)
 * 6) 🇪🇸 Sergi Bruguera (first round)
 * 7) 🇸🇪 Thomas Enqvist (champion)
 * 8) 🇺🇸 Andre Agassi (final)