Estep grew up in Dallas, where he graduated from the
St. Mark's School of Texas. As a junior tennis player, Estep held a No 1 national ranking for five straight years (from 1963 to 1967). Estep was named the Texas High School Player of the Year, and led the U.S. to the Sunshine Cup Title and played on the U.S. Junior Davis Cup Team. When Estep and George Taylor won the USTA national junior doubles tournament, they became the first team of Texans to win a national tennis championship. == College tennis ==