Roger Federer criticised French Open security after he was intercepted on court by a young spectator at the end of his first-round victory over Alejandro Falla.
A boy ran on court and made persistent attempts to take a photograph with the Swiss star as he tried to leave the Philippe Chatrier court, before security finally intervened.
Federer cruised to a 6-3 6-3 6-4 win over Colombian Falla but the 17-time Grand Slam champion was angry about the incident, saying it was not the first time it had happened at the tournament.
"I'm not happy about it, obviously not for one second am I happy about it," Federer said. "It happened yesterday in the practice, too.
"It's just a kid, but then three more kids came.
"And today on centre court where you would think this is a place where nobody can come on, he just wanders on and nothing happens.
Federer advanced with relative ease, but his exit from court was disrupted by a young fan looking for a selfie. http://t.co/FDTdPZKMYF— ESPNTennis (@ESPNTennis) May 24, 2015
"It happened during the final in 2009 as well for me. So I definitely think something needs to happen quickly.
"Normally, I only speak on behalf of myself, but in this situation I think I can speak on behalf of all the players, that where you do your job, that's where you want to feel safe.
"And so clearly I'm not happy about it. But nothing happened, so I'm relieved. But clearly it wasn't a nice situation to be in."
Saturday was 'kids' day' at Roland Garros and Federer was again approached for photographs by youngsters while he practised on Court 3.
The 33-year-old said he received a personal apology from Roland Garros tournament director Gilbert Ysern after his match against Falla, but insisted similar incidents cannot happen again.
"First, it should never happen," Federer said.
"There are so many players, so many fans, so much focus by the media on Roland Garros that people should react much more quickly".
Meanwhile, Federer's compatriot Stan Wawrinka also made it through to the second round after a comfortable 6-3 6-2 6-3 win over Turkey's Marsel Ilhan.
But the surprise of the day came on Court 7, where 25th seed Ivo Karlovic lost to Cypriot veteran Marcos Baghdatis.
Croatia's Karlovic served 21 aces but could not prevent a 7-6 (7/5) 6-4 6-4 defeat to Baghdatis, who is due to face Federer in round three.
Seeds Kei Nishikori, Jo-Wilfried Tsonga and Philipp Kohlschreiber are all safely through.
British trio Andy Murray, Aljaz Bedene and Kyle Edmund play their opening matches in the tournament today.