It was Djokovic's third day in a row on court at Roland Garros. He beat Juan Martin del Potro in the previous round on Saturday in a match that stretched over two days.
Djokovic is 41-0 in 2011, the second-best start to a season in the Open era, which began in 1968. He also won his last two matches of 2010, making his overall run the third-longest, behind Guillermo Vilas' record of 46 in a row in 1977.
Bidding for his third Grand Slam title - and first at Roland Garros - Djokovic will next play Fabio Fognini of Italy.
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