1973 Union Trust Classic – Singles

The 1973 Union Trust Classic – Singles was an event of the 1973 Union Trust Classic men's tennis tournament that was played in Merrifield, Virginia in the United States from March 19 through March 25, 1973. The draw comprised 32 players and four players were seeded. Stan Smith was the defending singles champion but did not take part in this edition. Unseeded Tom Okker won the title, defeating unseeded Arthur Ashe in the final, 6–3, 6–7(4–7), 7–6(7–3).

Seeds
• # 🇺🇸 Marty Riessen (second round)

• # 🇳🇿 Brian Fairlie (first round)

• # 🇬🇧 Roger Taylor (semifinals)

• # 🇬🇧 Mark Cox (quarterfinals)