The 1973 Union Trust Classic, also known as the Washington Indoor, was a men's tennis tournament played on indoor carpet courts at the Four Seasons Tennis Club in Merrifield, Virginia in the United States that was part of Group B of the 1973 World Championship Tennis circuit. It was the second edition of the tournament and was held from March 19 through March 25, 1973. Unseeded Tom Okker won the singles title and earned $10,000 first-prize money after his opponent in the final, fifth-seeded Arthur Ashe, failed to convert two matchpoints in the final set.[3][4][5][6]
^Mike Klingaman (March 20, 1973). "Lamar Hunt says tennis war is only hurting the game". The Evening Sun. p. C 12 – via Newspapers.com. Hunt's WCT pros, led by Arthur Ashe and Marty Riessen, are in Merrifield, Va., all week, competing in the $50,000 Union Trust Classic.
^"Okker defeats Ashe in Washington tennis". The Baltimore Sun. March 26, 1973. p. C 2 – via Newspapers.com. Tom Okker of the Netherlands rallied from the brink of defeat to beat Arthur Ashe, 6-3, 6-7, 7-6, and capture the $50,000 Union Trust Tennis Classic championship yesterday. The victory was worth $10,000.
