Novak Djokovic returns a shot to Michael Berrer during the Day 4 of China Open in Beijing. (Feng Li/Getty Images)
GALLERY: ATP Champions of 2012

Novak Djokovic returns a shot to Michael Berrer during the Day 4 of China Open in Beijing. (Feng Li/Getty Images)
GALLERY: ATP Champions of 2012
Are we human? Or are we dancer? Or are we both a.k.a Novak Djokovic?