Roger Federer cruised into the French Open second round on Monday and then hit out at the decision by Roland Garros organizers to introduce new balls at the tournament.

Throughout the European claycourt swing, Dunlop balls were used, but the second Grand Slam event of the season has instead opted for Babolat, which generally move faster through the air, as part of a new deal with manufacturers.

"I'm hearing a lot of conversations about the balls. It's just that they're not the same from what we've just played with for the last month," said Federer.

"And that for us is the most frustrating part, that the tournaments all changed to the Roland Garros ball after last year, (but) Roland Garros has changed their balls again.

"Now we're stuck with a different deal for all the different ATP Tour events. That is the frustrating part that we need to adjust."

Britain's Andy Murray said he was unconcerned about the type of ball used but wished it was a consistent choice at the four Grand Slams.