Rafael Nadal declared he must improve every aspect of his game despite dominating Jordan Thompson in the first round of the French Open on Monday.

Nadal arrived at Roland Garros with just five matches under his belt in the clay-court season after recovering from a foot injury, but cruised to a 6-2 6-2 6-2 victory over Thompson on Court Philippe-Chatrier.

That moved him beyond Roger Federer's record number of victories at a single grand slam with 106 from 109 matches, with the Swiss great's 105 coming at Wimbledon.

Nadal, bidding to win the Paris major for a record-extending 14th time and take his overall haul to 22, will face Corentin Moutet in the second round and the fifth seed says there is plenty of room for improvement.

The Spaniard said: "I need to improve in all ways. I think I need to improve my movement, the speed of my forehand, the speed I think could be better and should be better. 

"I did things well, for a while was good. The conditions were heavier than usual here, very humid, the court. I don't know, [maybe] having the roof on for a long time.

"I am happy with the performance. It has been a positive start. Then of course, the kind of player that I am, I'm always looking for something else, looking for better things. 

"That's what I am going to try to find in my practice tomorrow and then in the next match."

Nadal says there is no point dwelling on the disappointment of not having played on his favourite surface as often as he usually has before the second major of the year.

He added: "I got injured, and that's it. What happened is past, and here we are. We are in Roland Garros. I am here to try my best.

"And how is my level of confidence, how the things would be or if I didn't get injured, I don't know. We will never know.

"I'm not a big fan of think about the things that could happen if – 'if' is a dangerous word.  You have to accept the moment to accept the moment, to accept the situation and to have the confidence to put all my effort in every single day, to get better and better. Let's see how far I can keep going."