Olympic gold medallist Joe Choong knows he’ll need to be more than a ‘one-day wonder’ to defend his title in Paris. Choong’s sport – modern pentathlon, consisting of swimming, fencing, horse riding, shooting and running – has undergone a radical change since he won the Olympic title in Tokyo. In order to increase the sport’s appeal, organisers have crunched the Semi-Finals and Final down to 90 minutes. Even the order of disciplines has changed – meaning Choong’s game has totally altered. “I wouldn’t say the change favours me, if I’m perfectly honest,” said the 28-year-old. “I’m more of a power…