Ben Rothenberg on Twitter: "Roger Federer underwent knee surgery yesterday, and will be off tour for four months." / Twitter
Roger Federer and the End of Athlete's Knee
Roger Federer withdraws from Tokyo Olympics due to knee injury - Sports Illustrated
Everything you need to know about Meniscal knee injury – Momentum Sports & Rehabilitation Everything you need to know about Meniscal knee injury
Doctor Explains Roger Federer's Multiple Knee Surgeries - YouTube
Knee problems again? - Questions about Roger Federer's fitness level · tennisnet.com
Bad news! Roger Federer has to undergo another knee operation · tennisnet.com
Federer to miss French, US Open over knee surgery; will return in 2021
Roger Federer to miss French Open after knee surgery - The Boston Globe
Roger Federer makes stunning knee surgery announcement and confirms he'll miss French Open | Tennis | Sport | Express.co.uk
Roger Federer gives new injury update with tennis icon 'feeling like a racehorse in a box' | Tennis | Sport | Express.co.uk
Roger Federer out for Olympics, done for year with injury | The Star
Roger Federer to miss 2016 Rio Olympics due to knee injury - National | Globalnews.ca
Roger Federer has knee surgery | CNN
When Roger Federer had surgery, they recommended gaining...', says physio
Why are Tennis Knee Injuries so Common? | London Sports Injury Specialist
Roger Federer ruled out of French Open as doubts swirl again over future | Roger Federer | The Guardian
Roger Federer Faces Knee Surgery, Putting His Future in Doubt - The New York Times
Roger Federer has knee surgery | CNN
Roger Federer knee injury ends big four era on ATP and Rio Olympics - Movie TV Tech Geeks News
