Jeffrey John J. J. Wolf is an American professional tennis player. He achieved a career-high ATP singles ranking of world No. 83 on 15 August 2022. Wolf played collegiately at The Ohio State University.

Wolf was born in Cincinnati, Ohio, and attended Cincinnati Country Day School in Indian Hill, Ohio. He is the grandson of NBA basketball coach Charley Wolf. In 2016, as the nation’s third-ranked recruit, he committed to playing collegiate tennis for the Ohio State Buckeyes. On the junior tour, Wolf has a career-high ranking of No. 18 achieved on 16 May 2016.

J.J. Wolf’s parents: Jeff Wolf, and Brooke Wolf

John’s father Jeff Wolf is a member of the Rollins College Hall of Fame. Brooke, his mother, was an All-Mid-American Conference tennis player at Miami University, and Danielle, his sister, is a sophomore on the Ohio State women’s tennis team. J.J has stated that My family is my biggest fan. His first doubles partner was his mother, and his first practice partner was his sister. They used to play mixed matches when he was younger. His mother and he opposed his sister and father.