The 1973 Denver WCT, also known as the 1973 United Bank Tennis Classic for sponsorship reasons, was the second edition of the tennis event. It was held on indoor carpet courts in Denver, Colorado. The tournament was held between the April 23 and April 30, 1973. The tournament was part of the World Championship Tennis tour, and was part of the Group B circuit. As a result the defending champions Rod Laver, of the doubles and singles, along with his doubles partner Roy Emerson, were ineligible to compete. Ninth-seeded Mark Cox won the singles title.[1]
Mark Cox defeated 
Arthur Ashe 6–1, 6–1
Arthur Ashe / Roscoe Tanner defeated Tom Okker / Marty Riessen 3–6, 6–3, 7–6