Segura also found time to coach Jimmy Connors, Tracy Austin, Charlie Pasarell, and Stan Smith, four great tennis champions, as well as his son Spencer Segura, who played at UCLA, and is a lawyer/investor. In 1971, he left Beverly Hills to become the head teaching professional at the La Costa Resort in Carlsbad, California, where he eventually retired. He is widely credited with having mentored and structured the playing game of Jimmy Connors, starting at age 16, in 1968, when his mother, Gloria, brought him to Pancho in California for lessons. Dr. Abraham Verghese describes taking a tennis lesson from Segura during this period in his book "The Tennis Partner".