Tennis: Dopage: Federer a été l'un des plus contrôlés en 2019 - Le Matin
Roger Federer is retiring from tennis -- but his mark on the sport is indelible
Back From a Knee Injury, Federer Tries to Catch Up - The New York Times
Tennis on the right track in anti-doping fight - Federer
The Tennis Purist: The Curious Case of Roger Federer
Rafael Nadal and Roger Federer accused of doping by young tennis player
Roger Federer frustrated by tennis' anti-doping programme – The Irish Times
Roger Federer Calls for Greater Anti-Doping Investment in Tennis
Federer calls for more frequent doping tests
Roger Federer was tested for doping 29 times in 2019
Sharapova fiasco: Roger Federer roots for consistent global dope testing
Federer wants more doping tests in tennis | Tennis News – India TV
Roger Federer: World No 1 had more than 14 anti-doping tests in 2017 | Tennis | Sport | Express.co.uk
Shocked Federer breaks silence on Sharapova doping scandal
Federer backs Sharapova doping ban | The Guardian Nigeria News - Nigeria and World News — Sport — The Guardian Nigeria News – Nigeria and World News
Roger Federer still surprised at lack of doping tests
Federer: 'Naive to think tennis is clean' | CNN
The Tennis Purist: The Curious Case of Roger Federer
Roger Federer calls for zero tolerance amid Maria Sharapova's doping ban | India.com
Roger Federer Enters BNP Paribas Open with No. 1 World Ranking
Roger Federer wants doping crackdown in wake of Maria Sharapova failing test | Roger Federer | The Guardian
Roger Federer, Rafael Nadal weigh in on Viktor Troicki's doping ban - Sports Illustrated
Roger Federer concerned about demands of tennis tour
Caught on camera: Federer doping : r/tennis
Federer wants more doping tests in tennis - SWI swissinfo.ch
Roger Federer demands more regular drug testing in tennis and greater investment in anti-doping
