Paul is well known in competition tennis. Paul was a leading American junior player who played in the US National Junior Championships, Captain of the University of California, Berkeley’s tennis team, playing in the NCAA championships, a touring professional player who played in two Grand Slams, and became the first touring coach on the ATP men’s tour. Some of Paul’s students included ATP President Harold Solomon, Grand Slam winners: John McEnroe, Serena Williams, Venus Williams, Michael Chang and many other world class men’s and women’s champions. Paul was the Advisory Davis Cup coach to the Nation of Israel, on the Board of Experts at World Tennis Magazine for many years, and was considered by many to be the leading tennis coach in the world.