1991 Volvo Tennis Indoor – Singles

Michael Stich was the defending champion, but lost in the final to Ivan Lendl. The score was 7–5, 6–3.

Seeds
All seeds receive a bye into the second round. • # Ivan Lendl (champion)

• # 🇺🇸 Pete Sampras (Third round, retired)

• # 🇪🇨 Andrés Gómez (second round)

• # (n/a)

• # 🇺🇸 Michael Chang (semifinals)

• # 🇺🇸 Jim Courier (third round)

• # 🇩🇪 Michael Stich (final)

• # 🇦🇺 Darren Cahill (quarterfinals)

• # Petr Korda (second round)

• # 🇺🇸 David Wheaton (second round)

• # 🇺🇸 Derrick Rostagno (semifinals)

• # 🇧🇷 Luiz Mattar (second round)

• # 🇮🇹 Cristiano Caratti (quarterfinals)

• # 🇦🇺 Wally Masur (third round)

• # Mark Koevermans (quarterfinals)

• # Paul Haarhuis (third round)