Andy Murray was content with his start to what he hopes will be another long run at the French Open.
The world number four was a big favourite to beat Japanese debutant Tatsuma Ito and his only moments of concern came in the second set when the 24-year-old hit a hot streak.
But Murray survived and raced through the third set to win 6-1 7-5 6-0 and set up a second-round clash with Finnish world number 48 Jarkko Nieminen.
"It was pretty good," said Murray. "He played well for a five or six-game stretch in that second set and I played one bad game on my serve.
"The first and third sets were very comfortable. The second set could have been, but I obviously played a bad game. For a first-round match in a slam, it's a good start."
Murray had had to wait until the third day of the tournament to begin his campaign, and he certainly wasted no time once he finally got onto Court Suzanne Lenglen, racing through the first five games.
Ito is ranked at a career-high 68th in the world but has been playing mostly on hard courts in the Far East on the second-tier Challenger circuit.
Murray looked relaxed and in complete control but, from 2-0 down in the second set, Ito suddenly began playing the attacking tennis he had promised, and a poor game from the fourth seed allowed him to level.
Last year's semi-finalist was in a real hole when Ito got to 0-40 in the eighth game but this time Murray saved all three break points and gained the crucial break on his fourth chance three games later.
From there things became a lot more straightforward as Ito returned to his error-strewn ways and Murray made it nine straight games to clinch victory.
The world number four felt he had handled Ito's purple patch well, saying: "If you concentrate on your side of the court and don't give up too many free points yourself, then it's fine.
"If you're making mistakes and playing a patchy match yourself, then it can become difficult. It can be very up and down, but I didn't do that today.
"I just tried to give a bit more height on the ball. With his game style, he's quite a flat hitter of the ball. He liked it when the ball was between his waist and shoulders.
"I just gave the ball a little bit more height, a little bit more variation, and he started to make mistakes. That was it. You just go and try to find a way of getting through it, and I did that.
"He's a good player. This happens. There's a reason why he's in the top 70 players in the world. Tennis is very strong just now.
"You expect guys to be able to play well and he played well for a period of the match. But in the slams you have to play well for long periods of matches, and that's the difference between winning and losing a lot of the time."
Murray came into the tournament nursing a niggling back injury but he is confident it will continue to improve as long as he has the right rest and recovery in between matches.
He said: "My back is fine and hopefully it will keep getting better each day. I'll make sure I do all the right things so that it feels as good as possible through the tournament."