 It is the official rating system of major organizations such as the Intercollegiate Tennis Association and World TeamTennis and is frequently used in segments on the Tennis Channel.The algorithm analyzes more than 8 million match results from over 800,000 tennis players worldwide.On May 8, 2018, Rafael Nadal – having won 46 consecutive sets in clay court matches – had a near-perfect clay UTR of 16.42.