Michael Phelps (R) and Chad le Clos (Rob Schumacher/USA TODAY Sports)

By Julian Linden

SINGAPORE, Oct 31 (Reuters) – Chad le Clos, one of the few men to have beaten Michael Phelps at the Olympics, has thrown down the challenge to his old rival, urging him to get back into training so they can have a rematch at Rio in 2016. 462 more words