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The Wilson US Open Extra Duty tennis ball is the official ball of the US Open since 1978. The US Open tennis ball is made with exclusive felt from Tex Tech Industries for superior playability consistency and durability. The yellow extra duty felt is made for hard court surfaces. Also available are Wilson US Open Regular Duty tennis ball for clay or indoor courts Wilson US Open High Altitude tennis ball for all court surfaces over 3500 ft. elevation or Wilson US Open Grass Court tennis ball with white felt. The Wilson US Open tennis ball is both USTA and ITF approved.
- USTA and ITF approved for competitive play
- Made with premium tex/tech industries felt
- Optimal performance and durability on hard courts
- High altitude core for best performance on courts above 3000ft
- All court Felt What’s in the box 1 x TIN OF 3 TENNIS BALLS