Marc Marquez has ramped up the psychological pressure on his MotoGP title rivals by claiming that his sternest opponent is his own body. <br>The factory Ducati rider has battled injuries for years, and still hasn't fully recovered from the consequences of his fall in Indonesia last season. <br>But despite the state of his fitness, he is fifth in the world championship, 40 points behind leader ...<a class='more' href='https://www.motorsport.com/motogp/news/marc-marquez-my-biggest-motogp-opponent-is-my-fitness/10837633/?utm_source=RSS&utm_medium=referral&utm_campaign=RSS-MOTOGP&utm_term=News&utm_content=www'>Keep reading</a>