1990 Volvo U.S. National Indoor – Singles

Brad Gilbert was the defending champion, but did not take part in the U.S. National Indoor tennis tournament that year. Michael Stich clinched his first career singles title in the final, defeating Wally Masur 6–7(5–7), 6–4, 7–6(7–1).

Seeds
All seeds receive a bye into the second round. • # 🇸🇪 Stefan Edberg (second round)

• # 🇺🇸 Michael Chang (second round)

• # Andrei Chesnokov (third round)

• # 🇺🇸 Kevin Curren (third round)

• # Christo van Rensburg (second round)

• # 🇦🇺 Wally Masur (final)

• # Marcelo Filippini (third round)

• # 🇸🇪 Mikael Pernfors (second round)

• # 🇺🇸 Paul Annacone (second round)

• # 🇺🇸 Paul Chamberlin (third round)

• # 🇫🇷 Jean-Philippe Fleurian (third round)

• # 🇺🇸 Richey Reneberg (third round)

• # Petr Korda (quarterfinals)

• # 🇳🇿 Kelly Evernden (second round)

• # 🇺🇸 Jimmy Arias (third round)

• # 🇦🇺 Darren Cahill (third round)