Regaining his love for tennis, David started to train again, but this time for a sporting career in wheelchair tennis - "For me, the biggest challenge in wheelchair tennis I found was the actual wheelchair itself. It takes a while to get the wheelchair dialed in, so it fits each individual person based on their disability. But once it is, it feels great and makes the sport so wonderful".
By 2002, David was the number 1 U.S ranked quadriplegic player and went on to win gold at the 2004, 2008 and 2012 Paralympic Games. Also a 15 time Grand Slam winner, David has been in the top 3 of the world since 2002. "I absolutely love wheelchair tennis, it means everything to me. It has given me so much and allowed me to travel the world and meet many wonderful people. I donate my time and services to help others get involved in this wonderful sport too. My dream is to, at some point, be able to coach wheelchair tennis and help develop tennis in the United States to an even higher level than it already is".