World No. 1 Novak Djokovic endured a tough return to the ATP singles circuit but battled through to beat Marton Fucsovics of Hungary 6-2, 4-6, 6-3 in the second round of the Paris Masters on Tuesday. 

The 20-time Grand Slam champion had said on Sunday his greatest fear was lack of match practice having not played since Daniil Medvedev dashed his dreams of a Grand Slam sweep in the US Open final in September.