1998 RCA Championships – Singles

Jonas Björkman was the defending champion, but lost in the second round to Jason Stoltenberg.

Àlex Corretja won the title, defeating Andre Agassi in the final 2–6, 6–2, 6–3.

Seeds
The top eight seeds received a bye into the second round. • # Marcelo Ríos (third round)

• # 🇪🇸 Carlos Moyá (second round)

• # 🇬🇧 Greg Rusedski (quarterfinals)

• # 🇸🇪 Jonas Björkman (second round)

• # 🇺🇸 Andre Agassi (final)

• # 🇪🇸 Àlex Corretja (champion)

• # 🇪🇸 Albert Costa (second round)

• # 🇪🇸 Alberto Berasategui (second round)

• # 🇫🇷 Cédric Pioline (second round)

• # 🇪🇸 Félix Mantilla (second round)

• # 🇦🇺 Mark Philippoussis (third round)

• # 🇦🇹 Thomas Muster (second round)

• # 🇪🇸 Francisco Clavet (third round)

• # Wayne Ferreira (quarterfinals)

• # 🇺🇸 Todd Martin (semifinals)

• # 🇮🇹 Andrea Gaudenzi (first round)