Pre Open Era (1946-1967)
Post WWII to the start of the Open Era in 1968
In the roughly 20 years between the end of the Second World War and the onset of the Open Era, tennis experienced another era of growth. The expanding diversity of the sport and greater media attention led to a more varied audience and greater participation in the game.
1937-1969 United States Lawn Tennis Association U.S. National Championships Men’s Singles Challenge Trophy
1945-1950 United States Lawn Tennis Association U.S. National Championships Women’s Singles Challenge Trophy