Notes: 

## APPENDIX K ITF RULES OF TENNIS 

1 The largest permissible change in the specified properties resulting from the durability test described in the current edition of ITF Approved Tennis Balls & Classified Court Surfaces . The durability test uses laboratory equipment to simulate the effects of nine games of play. 

d. Only the ball types specified in the ITF Rules of Tennis can be used in 10 and under tennis competition. See the complete rules for details. 

e. All tests for rebound, mass, size, deformation and durability shall be made in accordance with the Regulations described in the current edition of ITF Approved Tennis Balls & Classified Court Surfaces . 

## CLASSIFICATION OF COURT PACE 

The ITF test method used for determining the pace of a court surface is ITF CS 01/02 (ITF Court Pace Rating) as described in the ITF publication entitled “ITF guide to test methods for tennis court surfaces”. 

Court surfaces which have an ITF Court Pace Rating of 0 to 29 shall be classified as being Category 1 (slow pace). Examples of court surface types which conform to this classification will include most clay courts and other types of unbound mineral surface. 

Court surfaces which have an ITF Court Pace Rating of 30 to 34 shall be classified as being Category 2 (medium-slow pace), while court surfaces with an ITF Court Pace Rating of 35 to 39 shall be classified as being Category 3 (medium pace). Examples of court surface types which conform to this classification will include most acrylic coated surfaces plus some carpet surfaces. 

Court surfaces with an ITF Court Pace Rating of 40 to 44 shall be classified as being Category 4 (medium-fast pace), while court surfaces which have an ITF Court Pace Rating of 45 or more shall be classified as being Category 5 (fast pace). Examples of court surface types which conform to this classification will include most natural grass, artificial grass and some carpet surfaces. 

Case 1: Which ball type should be used on which court surface? 

Decision: 3 different types of balls are approved for play under the Rules of Tennis, however: 

a. Ball Type 1 (fast speed) is intended for play on slow pace court surfaces 

b. Ball Type 2 (medium speed) is intended for play on medium-slow, medium and medium-fast pace court surfaces 

c. Ball Type 3 (slow speed) is intended for play on fast pace court surfaces 

