The 1998 Pilot Pen International was a tennis tournament played on outdoor hard courts at the Cullman-Heyman Tennis Center in New Haven, Connecticut in the United States that was part of the International Series Gold of the 1998 ATP Tour and of Tier II of the 1998 WTA Tour. The men's tournament was held from August 17 through August 23, 1998 while the women's tournament was held from August 24 through August 30, 1998.
Karol Kučera defeated Goran Ivanišević 6–4, 5–7, 6–2
- It was Kučera's 2nd title of the year and the 4th of his career.
Steffi Graf defeated Jana Novotná 6–4, 6–1
- It was Graf's 1st title of the year and the 115th of her career.
Wayne Arthurs / Peter Tramacchi defeated Sébastien Lareau / Alex O'Brien 7–6, 1–6, 6–3
- It was Arthurs' 2nd title of the year and the 4th of his career. It was Tramacchi's only title of the year and the 1st of his career.
Alexandra Fusai / Nathalie Tauziat defeated Mariaan de Swardt / Jana Novotná 6–1, 6–0
- It was Fusai's 3rd title of the year and the 7th of her career. It was Tauziat's 3rd title of the year and the 21st of her career.
Long Island/New Haven/Winston-Salem tournaments