There's just no satisfying some people.

Chinese swimmer Sun Yang won gold medals in the 800m and 1,500m freestyles at the FINA World Championships in 2011, but his coach thinks he can win four titles at the event in July.

"My target is to help him regain his peak form like he had in London as soon as possible, said coach Zhu Zhigen. "(If we can do that), he will have a chance to win four individual events (ranging from the 200m to the 1,500m)."