The mystifying funk of Novak DjokovicGONZALO FUENTES/REUTERS Novak Djokovic's decline has been stunning to see. OPINION: Novak Djokovic was his puppyish, crowd-pleasing self on Friday, posting a video of himself pretending to perform Debussy's Clair de Lune on a self-playing piano. Ever since, he has slipped into a mystifying funk, his listlessness rising in proportion to the allegations of turbulence in his personal life. GETTY IMAGES Novak Djokovic shows his emotion as he waves to the crowd after his defeat against Juan Martin Del Potro at the Rio Olympics. But it is difficult to escape how sharply his experiences diverge from those of Andy Murray of late.

Source: Stuff November 10, 2016 23:16 UTC