Exactly one year ago, as the world's best tennis players faced each other in London at the season-ending finale, Rafael Nadal couldn't even practice. Trying not to look too far ahead, the Spaniard was at home in Spain, just thinking about his badly injured knee. Nadal didn't know if he would play competitive tennis again. Just nine months after returning from his career-threatening injury, Nadal became the first player to hold, lose and regain the year-end No. 1 spot twice by beating Stanislas Wawrinka 7-6 (5), 7-6 (6) at the ATP finals. More...