www.1alltennis.org At One All, we believe all youth should have the tools to live a healthy life, th At One All, we believe all youth should have the tools to live a healthy lifestyle, theskills to make their dreams a reality, and the kindness of heart to make the worlda better place.One All Tennis Association conducts after school programs that use tennis as a means to promote health, wellness and character development. One All hosts free clinics and tennis festivals to provide children and adults with additional opportunities to learn and play tennis. One All Tennis Association is working in conjunction with the United States Tennis Association and Greater San Diego Tennis Council to paint court lines on playgrounds to facilitate play during physical education classes and refurbish local tennis courts for the community.