1998 Porsche Tennis Grand Prix
Date	5–11 October
Edition	21st
Category	Tier II
Draw	28S / 16D
Prize money	$450,000
Surface	Hard / indoor
Location	Filderstadt, Germany
Venue	Filderstadt Tennis Club
Champions
Singles
Sandrine Testud
Doubles
Lindsay Davenport Natasha Zvereva
← 1997 · Porsche Tennis Grand Prix · 1999 →

The 1998 Porsche Tennis Grand Prix was a women's tennis tournament played on indoor hard courts at the Filderstadt Tennis Club in Filderstadt in Germany that was part of Tier II of the 1998 WTA Tour. It was the 21st edition of the tournament and was held from 5 October until 11 October 1998. Unseeded Sandrine Testud won the singles title and earned $79,000 first-prize money.^[1]

Sandrine Testud defeated Lindsay Davenport 7–5, 6–3

• It was Testud's only title of the year and the 2nd of her career.

Lindsay Davenport / Natasha Zvereva defeated Anna Kournikova / Arantxa Sánchez-Vicario 6–4, 6–2

• It was Davenport's 10th title of the year and the 41st of her career. It was Zvereva's 6th title of the year and the 79th of her career.

• ITF tournament edition details Archived 2016-09-19 at the Wayback Machine