"I really like the sport and I even used to play it in my younger days but that was with a wooden racket," 17-times grand slam champion Federer told Reuters after he suffered a surprise defeat in the quarter-finals of the World Indoor Tournament.
"There are some great characters active in the sport and I believe that they deserve to be present at the Olympics."
Martial arts karate and wushu, rollersports, wakeboarding, squash, sports climbing, wrestling and a joint bid by baseball and softball are the candidates for the one open spot for the 2020 Games.
