Nadal leads the head-to-head against:
Federer 18-10 (8-2 in majors)
Djokovic 19-14 (6-3 in majors)
Murray 13-5 (6-2 in majors)
Nadal has the most ridiculous clay-court dominance, and has also won the career Grand Slam. He also had a period of winning 8 titles in 4 months from April to August 2008.