Milos Raonic says it is a "great honour" to have added John McEnroe to his coaching team on a short-term basis.

Former world number one McEnroe will link up with Raonic for a three-week period ahead of Wimbledon, a tournament the American claimed three singles titles and five doubles crowns at during his illustrious playing career.

There was disappointment for Raonic on Sunday as he exited the French Open courtesy of a surprise defeat to Albert Ramos-Vinolas.

However, the Canadian is optimistic over his link-up with McEnroe, who was courtside for the eighth seed's fourth-round defeat at Roland Garros.

"I was sort of just looking for another set of eyes to be a bit more efficient on grass," Raonic explained. "I think people are seeing it as just plain folks on grass, that's what it's far from. It's about generally improving. I want to improve that coming forward and I want to improve putting more pressure on my opponents.

"I feel like I was a lot more efficient at the beginning of the year coming forward, and it's something that I would like to put a lot of attention to and find a way. And it just works out with grass that's probably the thing that will benefit me the most.

"Now there is going to be the three weeks leading to Wimbledon that we are going to work, and really put some attention to that and just find that go sort of groove, that efficiency.

"It's a great honour [to have McEnroe on board] and, you know, there's a lot I want to achieve. I'm what seems maybe far from it today, but I feel like I'm a lot closer and I'm going to try to do everything I can to sort of maximize that myself and maximize giving myself that opportunity to achieve those goals."

Raonic already had Carlos Moya and Riccardo Piatti as coaches, but does not foresee a problem with receiving additional advice.

"At the end of the day, every coach I have is to some extent an advisor, and it is my job personally, out of everything I hear, to weigh what it's worth and weigh what is best for me. I'm the CEO of the Milos Raonic Tennis. That's it," he added.

"I take everybody's consultations very personally. I know everybody I have around me wants to help me to the fullest."