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What Color are Your Balls?

You can probably win a bar bet armed with the knowledge of how many types of tennis balls are approved for adult sanctioned play by the ITF. The correct answer is 4: Type 1 (Fast), Type 2 (Medium), Type 3 (Slow), and High Altitude. Appendix I of the ITF Rules of Tennis contains a table with the conformance requirements for weight, size, rebound, and deformation for each ball type. Today we are focusing on the conformance requirement for “colour.”

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