Djokovic led 3 - 0 in the third and standing on the baseline .
Djokovic turned his back to the court and clipped a shot between his legs to the flummoxed Lorenzi , who embarrassingly netted .
Leading 3 - 0 in the third and standing on the baseline , Djokovic turned his back to the court and clipped a shot between his legs to the flummoxed Lorenzi , who embarrassingly netted .