Djokovic remains undefeated in 2011 and has now gone 19 games unbeaten since the start of the new season.

Next up in the third round for the newly-installed world number two is American James Blake, who needed a tie-break decider to beat 28th seed Thomaz Bellucci of Brazil 2-6 6-4 7-6 (6).

"Everything was working perfectly," Djokovic said. "Most of the shots I was hitting were winners, so I wasn't making a lot of mistakes.

"I'm fresh mentally, motivated to have even more success. I'm looking to the upcoming challenges. I know it's only been a couple of months of the year, but I have been playing great, and I want to keep on doing that," he added.