1998 Grand Prix de Tennis de Lyon – Singles

Fabrice Santoro was the defending champion, but lost in the second round this year.

Àlex Corretja won the tournament, beating Tommy Haas 2–6, 7–6(8–6), 6–1 in the final.

Seeds
• # 🇺🇸 Pete Sampras (quarterfinals, withdrew)

• # 🇦🇺 Patrick Rafter (quarterfinals)

• # Marcelo Ríos (semifinals, retired)

• # 🇪🇸 Àlex Corretja (champion)

• # Jan Siemerink (first round)

• # 🇪🇸 Albert Costa (first round)

• # 🇫🇷 Cédric Pioline (second round)

• # 🇫🇷 Fabrice Santoro (second round)