A record-breaking 28 medals in his kitty, the most decorated Olympian Michael Phelps says although Beijing Olympics was the greatest for him the "climb up the mountain" to the Rio Games made it equally special.

Phelps won a staggering eight gold medals in the 2008 Beijing Olympics, winning all the events he participated in. In the 2012 London Games, the ace swimmer went on to win four gold and two silver medals.