WATCH: FUNNY! Novak Djokovic's hilarious on-court imitation of Fabio Fognini

New Delhi: Tennis star Novak Djokovic doesn't often fool around while on tennis court but here was a rare occasion when the Serbian brought out his imitations, going after opponent Fabio Fognini.

During his 'Djokovic and Friends' exhibition event on Tuesday, Djokovic and Fognini were joined by Serena Williams and Flavia Pennetta. Later, Djokovic also faced Rafael Nadal. (READ: Japan Open: Kidambi Srikanth advances to quarterfinals after Ajay Jayaram's injury)