1978 United Bank Tennis Classic – Singles

The 1976 United Bank Tennis Classic – Singles was an event of the 1976 United Bank Tennis Classic men's tennis tournament and was played on indoor carpet courts in Denver, Colorado in the United States, between February 20 and February 26, 1978. The draw comprised 32 players and eight of them were seeded. Björn Borg was the defending singles champion but did not compete in this edition. First-seeded Jimmy Connors won the United Bank Tennis Classic singles title by defeating fifth-seeded Stan Smith in the final, 6–2, 7–6(7–2).

Seeds
• # 🇺🇸 Jimmy Connors (champion)

• # 🇪🇸 Manuel Orantes (second round)

• # (Withdrew)

• # 🇵🇱 Wojciech Fibak (quarterfinals)

• # 🇺🇸 Stan Smith (final)

• # 🇺🇸 Tim Gullikson (first round)

• # 🇬🇧 Mark Cox (second round)

• # Cliff Drysdale (second round)