ITF

48 Calculation of results Record the location, magnitude and direction of all deviations outside the recommended limits. If any such deviation occurs in both test directions (parallel to and at right angles to the net), then it should only be counted once. Deviations exceeding 1 m in length shall be counted per metre, or part thereof. For example, a deviation (above the recommended limit) 2.5 m long shall equate to three deviations. The test value is the number of deviations outside the recommended limits for the surface type. Recommendations Refer to Table 4. Acrylic Artificial clay/grass; carpet Asphalt/ concrete; other 1 Clay Grass Evenness 6 mm 8 mm 6 mm Deviations 2 2 (PPA)/4 (TPA) 4 (PPA)/ 8 (TPA) N/A 3 Slope (max) 1:100 (1.00%) 1:120 (0.83%) 1:200 (0.50%) Planarity 4 ± 15 mm from true (PPA) ± 30 mm from true (TPA) Notes: PPA = Principal Playing Area; TPA = Total Playing Area. 1 Specifications are for porous constructions. For impervious constructions, see 'acrylic'. 2 In no instance should any imperfection exist that could cause the ball to deviate significantly from its path on a level surface, or expose a player to a significantly increased risk of injury within the perimeter of the court. 3 Deviations on clay or grass over 6 mm should be corrected where possible. 4 Unless design, specification or construction necessitate otherwise. Table 4. Evenness, slope and planarity recommendations for a tennis court.

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