1991 Mercedes Cup – Doubles

Pieter Aldrich and Danie Visser were the defending champions, but Aldrich did not compete this year. Visser teamed up with Gary Muller and lost in the quarterfinals to Nick Brown and Richard Vogel.

Wally Masur and Emilio Sánchez won the title by defeating Omar Camporese and Goran Ivanišević 4–6, 6–3, 6–4 in the final.

Seeds
All seeds received a bye to the second round. • # Gary Muller / Danie Visser (quarterfinals)

• # 🇺🇸 Luke Jensen / 🇦🇺 Laurie Warder (quarterfinals)

• # 🇬🇧 Neil Broad / Piet Norval (quarterfinals)

• # 🇩🇪 Udo Riglewski / 🇩🇪 Michael Stich (quarterfinals)

• # Paul Haarhuis /  Mark Koevermans (semifinals)

• # 🇮🇹 Omar Camporese / Goran Ivanišević (final)

• # 🇦🇺 Wally Masur / 🇪🇸 Emilio Sánchez (champions)

• # 🇺🇸 Kevin Curren / Stefan Kruger (second round)