A tennis ball is a small, hollow ball used in professional and recreational games of tennis.[1] Tennis balls are fluorescent yellow in organized competitions,[2][3] but in recreational play other colors are also used. Tennis balls are covered in a fibrous felt, which modifies their aerodynamic properties, and each has a white curvilinear oval covering it.
- ^ Oxford English Dictionary. Tennis ball (n.), sense a. "The small ball used in real tennis or lawn tennis."
- ^ "ITF Technical - History". International Tennis Federation. Retrieved 4 June 2015.
- ^ "Inside Wilson's tennis ball factory". ESPN The Magazine. 30 August 2015. Retrieved 2 November 2015.