Novak Djokovic may have booked his place in the French Open third round on Thursday with a straight-sets win, but the world number one was not happy with his display.

Ultimately Steve Darcis was no match for the Serbian as Djokovic wrapped up a 7-5 6-3 6-4 win in just over two hours on Court Suzanne-Lenglen.

However, Djokovic finished the match with 42 unforced errors and knows he must improve his performance if he is to complete a career grand slam.

"I'm pleased to get the job done in three sets, but there were things that I definitely didn't like in my game," he said.

"[There were] too many unforced errors from the first or second shot in the rally. But credit to Steve for playing a lot of variety and mixing up the pace. 

"I thought I started great, but I missed the opportunity to go double break and then all of a sudden with some unforced errors I allowed him to come back into the match.

"I would say that all three sets when I was a break up I allowed Steve to come back to those sets and fight for those sets, because I was managing to drop my serve very easily.

"So hopefully that's not going to happen in the following rounds. The matches will get tougher and it's kind of expected at the beginning that you are a bit rusty on the court and hopefully things will get better."