I provided the link because the article is pretty long. They graded the Who's Who of tennis which means the entire Top Ten.
2013 Season Awards, ATP, Report Card
http://tennis.si.com/2013/11/18/atp-report-card-2013-rafael-nadal-roger-federer-novak-djokovic/Rafael Nadal
Rafael Nadal’s banner year featured 10 titles, including the French Open and U.S. Open. (Julian Finney/Getty Images)
The Beyond The Baseline awards are our look back at the best — and worst — of the tennis season. We begin with our final “grades” for the ATP Tour singles players. Rafael Nadal headlines the list after a monstrous comeback season in which he regained the No. 1 ranking.
Head of the class
Rafael Nadal: He’s the player of the year by any metric. The Spaniard won 10 titles, including his eighth French Open and second U.S. Open, upping his Grand Slam haul to 13 titles. His season was shocking simply because he was able to bounce back from a seven-month injury layoff to dominate the tour so quickly and so consistently. Beating everyone on his beloved clay was one thing, but through the U.S. Open he also transformed into the best hard-court player, outpacing the likes of Novak Djokovic, Andy Murray and an admittedly subpar Roger Federer. For eight months, the Big Four was reduced to the Big One, and in this era of greatness, that’s one heck of a feat.