LONDON (AP) — A day after completing a career Golden Slam, Serena Williams still wants more.

Williams says she wants to defend her women's Olympic tennis singles gold medal in four years time at the Rio de Janeiro Games "unless an act of God doesn't allow me to."

The 14-time Grand Slam singles champion says she has no plans on slowing down, especially after battling health scares that sidelined her for 14 months: "When I feel I can't be greatest I shouldn't play anymore, but I feel I belong. I'm not tired, I'm enjoying myself."

The 30-year-old Williams beat Russia's Maria Sharapova to add Olympic gold to her titles in all four major tournaments. She then teamed with sister Venus to win the gold in doubles for the third time.