The 1977 United Bank Classic, also known as the Denver WCT, was a men's tennis tournament played on indoor carpet courts in Denver, Colorado in the United States that was part of the 3 star category of the 1977 Grand Prix circuit. It was the sixth edition of the tournament and took place from April 18 through April 24, 1977. First-seeded Björn Borg won the singles competition.
Björn Borg defeated 
Brian Gottfried 7–5, 6–2
Colin Dibley / Geoff Masters defeated Syd Ball / Kim Warwick 6–2, 6–3