The Sony Ericsson WTA Tour 2010 Official Rulebook - Tennis Canada

PLAYERS(2) millimeters from the base of the shoe.(c)Hardness and Maximum NumberThe hardness of any pimple or stud shall be between 55and 60 based on a Shore “A” scale. The number of pimplesper square inch shall be no less than 15 and no morethan 28.Shoes with pimples or studs around the outside of the toesshall not be permitted. Additionally, the foxing/sidewall can becontoured only in the medial forefoot and media toe area butonly within the following restrictions: the contoured area maybegin in the transition area between the outsole and the sidewallbut can only go to a maximum of 1.5 cm up the sidewall;and the countered area must be flat (not texturedc or undulating)but can be stepped with no more than 5 steps, each nomore than 1mm in depth.Forefoot and heel areas may be separated, but there shouldbe no more than a 2mm step in the outsole of the shoe.As an alternative to the above specifications, players may alsouse the special grass court shoes developed, tested andapproved by Wimbledon. Players desiring approval of specialgrass court shoes for WTA Tour Tournaments shall submit asample shoe to the WTA at least 90 days in advance of thegrass court WTA Tour Tournament at which they seek to wearsuch shoes.All shoes approved for play in 2009 shall continue to beapproved.ii.Clay Court ShoesPlayers are required to wear tennis shoes generally acceptedfor play on clay courts or granular surfaces. The Supervisorhas the authority to determine that a tennis shoe sole does notconform to such customs and standards and may prohibit itsuse at any WTA Tour Tournament.Grass court shoes may not be worn during a match on a claycourt.iii.Hard Court Shoes100