Roger Federer began his French Open campaign with a straight sets win over German Tobias Kamke.
The Swiss, seeded third, won through to the second round with a comfortable 6-2 7-5 6-3 victory against world number 78 Kamke.
Federer, 30, a winner at Roland Garros in 2009 and runner-up last year, coasted through the first set.
But he was a break down in the second before two breaks of his own won him the set.
Federer had no problems in closing out the third set and his victory equals Jimmy Connors' record of winning 233 Grand Slam matches.
Spaniard Feliciano Lopez , who was seeded 15, retired due to a side muscle injury after losing the first five games of his match against Florent Serra of France.
Lopez's fellow countryman Marcel Granollers , seeded 20, beat Portuguese Joao Sousa 6-2 3-6 6-3 6-4.
Top seed Serbian Novak Djokovic starts against Italian Potito Starace , while Czech seventh seed Tomas Berdych is also in action on Monday afternoon.
Andy Murray and Rafael Nadal play their first-round matches on Tuesday.