What Is the USTA 4 History of the USTA 8 Playing the Game 10 The Pro Circuit 14 The U S Open 18 Glossary 22 To Learn More 23 Index 24 The United States Tennis Association USTA supports tennis in the U S It is the largest tennis league in the world 4 join the Anyone can has over t 700,000 members USTA I 5 
