Every cricket fan and follower was shocked and saddened when they came to know that Yuvraj Singh, India's hero of the 2011 World Cup, is fighting cancer and is undergoing treatment in the United States. But everyone believes that the fighter that Yuvraj is, he will be triumphant. And he can take inspiration from other sportspersons who have successfully beaten this life-threatening disease and emerged as true champions, both on and off the field. Let's take a look: