Cristiano Ronaldo gets a few quick tips from Usain Bolt

The world's fastest man told Cristiano Ronaldo that he needed to sort out his posture if wanted to reach top speed. And while he was at it, he could do with some toughening up as well."He [Ronaldo] was asking me about running and I was telling him the reason why he has problems is that when he gets to the top speed, he tips over a bit," said Bolt, who may also have stumbled on the reason why