Davis Cup Is a Challenge Roger Federer Has Yet to Conquer - The New York Times
US Open: Novak Djokovic explains how 'ultimate' Roger Federer challenge 'shaped' him | Metro News
Roger Federer accepted a challenge from Gael Monfils and it did not end well - Article - Bardown
Federer overcomes plucky Alves challenge | Reuters.com
Tennis news - Roger Federer isolation volley challenge goes viral on social media - Eurosport
Federer Survives a Long Challenge From No. 49 Tipsarevic - The New York Times
Roger Federer Wall Challenge - Home Tennis Drills - YouTube
Roger Federer throws volleying at home lockdown challenge
THE ROGER FEDERER CHALLENGE - YouTube
Watch: Roger Federer starts fun tennis-at-home challenge with pro tips, celebs and fans join
French Open: Federer full of confidence after surviving Cilic challenge
Novak Djokovic Responds to Roger Federer's Volleying at Home Challenge
Alcaraz challenges Federer after US Open win; fires warning to Nadal, Djokovic | Tennis News - Hindustan Times
Roger Federer Announces Plans to Retire From Tennis - The New York Times
Tennis Player Roger Federer Gold Challenge Coin Set for Fans As Christmas Gift | eBay
How Did I Do Everyone?" - Sofia Kenin Accepts Roger Federer's Challenge - EssentiallySports
Roger Federer challenges fans and celebrities in volleying drill
Australian Open: Federer defuses Dimitrov challenge to bring up 300th slam win - ABC News
Federer treads water but the bigger fish lurk to challenge champion | Wimbledon | The Guardian
Big Three (tennis) - Wikipedia
