Federer's retirement: Who's saying what

Roger Federer's decision to retire provoked an emotional reaction, including from current and former tennis players, coaches and athletes in other sports.

Here, AFP Sport takes a look at some of the tributes paid to the 20-time Grand Slam champion on Thursday:

Old rivals and friends

"Dear Roger, my friend and rival, I wish this day would never have come It's been a pleasure but also an honour and privilege to share all these years with you, living so many amazing moments on and off the court."

-- Rafael Nadal on Twitter.

"I LOVE YOU, Roger. Thank you for everything you've done in tennis and with myself. Tennis world will never be the same without you."

-- Juan Marin del Potro, who retired earlier this year.

"Cheers Roger. Thanks for the shared memories my friend. It was an honor to share time/experiences on the most hallowed grounds in our sport. Don't be a stranger... Also, seems like a good time to start training for Wimby."

-- Andy Roddick, who lost to Federer in three finals at Wimbledon and one at the US Open.

"Thanks legend!!!"

-- David Ferrer

"Absolute living legend. Thanks for all the countless memories."

-- John Isner

The young(er) guns

"Roger has been one of my idols and a source of inspiration! Thank you for everything you have done for our sport! I still want to play with you! Wish you all the luck in the world for what comes next!"

-- World number one Carlos Alcaraz

"Thank you for doing more for tennis than any single individual."

-- Canadian former world number three Milos Raonic

"A role model for me and so many others!!... It's been a privilege to share the court with you!!"

-- Canadian youngster Denis Shapovalov

"Roger - you have always been such a huge inspiration to me. Your elegance, your grace, your beautiful game...