Novak Djokovic laid down the challenge to his French Open rivals by only dropping five games in a first-round win against Sweden's Mikael Ymer.
The Serb top seed, who is bidding for an 18th Grand Slam and a second French Open, eased to a 6-0 6-2 6-3 victory against the world number 80.
After cruising to a 20-minute opening set, Djokovic ruthlessly maintained his level to win in an hour and 38 minutes.
"My ambition is to fight for the title here," he said.
"It's just the start of the tournament, I just want to play one match at a time.