Back From a Knee Injury, Federer Tries to Catch Up - The New York Times
Federer wants more doping tests in tennis | Tennis News – India TV
Federer: 'Naive to think tennis is clean' | CNN
Tennis on the right track in anti-doping fight - Federer
Roger Federer frustrated by tennis' anti-doping programme – The Irish Times
Roger Federer saddened by Lance Armstrong's doping scandal | Cycling News
Federer defends doping procedures, but wants more testing | Reuters
Roger Federer demands more regular drug testing in tennis and greater investment in anti-doping
Federer: "Tennis schaffst du locker ohne Doping" · tennisnet.com
Wimbledon: Serena Williams asks for fair treatment over doping tests, Federer seconds
Federer wants more doping tests in tennis - SWI swissinfo.ch
Federer, Nadal disagree with Djokovic on Troicki's doping case - Sports Illustrated
Roger Federer explains how inconsistent drug testing can be at times
Rafael Nadal doping claims falsely spread by French star due to Roger Federer 'rivalry'? | Tennis News
Roger Federer calls for more doping tests in tennis | Roger Federer | The Guardian
Federer calls for more frequent doping tests
The Tennis Purist: The Curious Case of Roger Federer
Roger Federer wants doping crackdown in wake of Maria Sharapova failing test | Roger Federer | The Guardian
The Tennis Purist: The Curious Case of Roger Federer
Roger Federer was tested for doping 29 times in 2019
Novak Djokovic slams tennis' anti-doping procedures | South China Morning Post
Quarter-finalists should get drug tested at every event, says Federer
Federer wants more doping tests in tennis
Roger Federer: World No 1 had more than 14 anti-doping tests in 2017 | Tennis | Sport | Express.co.uk
