Federer On His Comeback: 'It's A Huge Challenge For Me' - CLICK NOW
Novak Djokovic, Alexander Zverev Respond To Roger Federer's Challenge: Watch
The Unexpected Challenge: Roger Federer's Wimbledon Quarterfinal Victory | The New Yorker
Germany′s Philipp Kohlschreiber set for Federer challenge after simple win | Sports | German football and major international sports news | DW | 02.09.2017
US Open: who can challenge Nadal, Federer and Djokovic? - AS.com
Federer expects battle to get back to the top
Federer Sees Off Istomin Challenge in Basel - peRFect Tennis
Watch: Roger Federer starts fun tennis-at-home challenge with pro tips, celebs and fans join
Roger Federer accepts charity match challenge from tennis-mad DCU students | LovinDublin
Roger Federer ready for the clay court challenge - ATP - World Today News