PARIS – On Friday night, John McEnroe announced that he would be working with Milos Raonic during the grass-court season. Apparently, he doesn't want to wait.

The seven-time Grand Slam champion joined Raonic on Court 13 at Roland Garros for a practice session on Saturday. During an early break in the workout, McEnroe, who had arrived separately from Raonic and his entourage, shook hands with each member of the team including coach Carlos Moya, strength and conditioning coach Dalibor Sirola and physiotherapist/osteopath Claudio Zimaglia.

Raonic's other coach, Riccardo Piatti, left Paris on Tuesday in a move planned in advance.

McEnroe and Raonic spoke during breaks in the practice and then engaged in a 10-minute conversation at the end of the session, which lasted just over an hour. It appeared like McEnroe, who is working at the French Open as a commentator, was doing most of the talking while Raonic listened intently.

"It's amazing," said Raonic's mom, Vesna, who watched the practice along with dozens of fans. "It means a lot when you see that people see him as someone with big potential. If John McEnroe wants to train with him, be his coach, that's amazing."

After the workout, McEnroe politely declined an interview request, saying he planned on doing some interviews at a later time. Per his custom, Raonic does not do interviews on his non-match days at Grand Slams.

"Milos Raonic can win majors," McEnroe said during an interview on Eurosport Friday night. "He's one of five or six guys that can win Wimbledon. I'm excited to be part of his team. Milos has a great team with Ricardo Piatti and Carlos Moya. I'm going to be a consultant on the grass."

Raonic is scheduled to play his fourth round match at the French Open on Sunday against 55th-ranked Spaniard Albert Ramos-Vinolas. The Canadian has been rolling through the tournament so far, winning all nine sets he's played. But during Friday's win over Slovakia's Andrej Martin, Raonic required a medical timeout early in the the third set to deal with a left hip injury.

"The muscles around it sort of seized up," Raonic explained in his post-match news conference. "The trainer was able to sort of assure me that from what he could tell, there was nothing serious there and that I'll have tests done on it now and take it from there."

During Saturday's practice, Raonic appeared to be pain-free, showing no ill effects from the injury as he went through a series of drills.