Wilson 55034 Regular Duty US Open Tennis Balls

The Wilson US Open Regular Duty tennis ball is the official ball of the US Open since 1978. The US Open tennis ball is made with exclusive woven felt from Tex Tech Industries for superior playability consistency and durability. The regular duty felt is perfectly made for clay grass or indoor court surfaces and is both USTA and ITF approved. Also available are the Wilson US Open Extra Duty tennis ball for hard courts and Wilson US Open High Altitude tennis ball for all court surfaces over 3500 ft. elevation.