1991 Porsche Tennis Grand Prix

The 1991 Porsche Tennis Grand Prix was a women's tennis tournament played on indoor hard courts at the Filderstadt Tennis Centre in Filderstadt, Germany and was part of the Tier II of the 1991 WTA Tour. It was the 14th edition of the tournament and was held from 14 October to 20 October 1991. Unseeded Anke Huber won the singles title and earned $70,000 first-prize money.

Singles
Anke Huber defeated 🇺🇸 Martina Navratilova 2–6, 6–2, 7–6(7–4)
 * It was Huber's 1st singles title of the year and the 2nd of her career.

Doubles
🇺🇸 Martina Navratilova / Jana Novotná defeated 🇺🇸 Pam Shriver /  Natasha Zvereva 6–2, 5–7, 6–4