Big Three (tennis) - Wikipedia
Roger Federer accepted a challenge from Gael Monfils and it did not end well - Article - Bardown
Alcaraz challenges Federer after US Open win; fires warning to Nadal, Djokovic | Tennis News - Hindustan Times
Novak Djokovic, Alexander Zverev respond to Roger Federer's challenge: Watch | Tennis News
Roger Federer: 'This is where you have to challenge yourself'
An interesting time” – Federer on the challenges of parenting
Roger Federer gives witty reply to fan performing his challenge in a Rafael Nadal t-shirt | Tennis News
Roger Federer throws volleying at home lockdown challenge
Roger Federer excited by Wimbledon challenge - Sports Mole
Federer treads water but the bigger fish lurk to challenge champion | Wimbledon | The Guardian
Take a Swing At The Roger Federer Challenge on Social Media | Time
French Open: Federer full of confidence after surviving Cilic challenge
Australian Open: Federer defuses Dimitrov challenge to bring up 300th slam win - ABC News
Novak Djokovic Responds to Roger Federer's Volleying at Home Challenge
Roger Federer challenges fans and celebrities in volleying drill
Tennis news - Roger Federer isolation volley challenge goes viral on social media - Eurosport
Roger Federer: 'I can't quite believe my No.1 challenge' | CNN
How Did I Do Everyone?" - Sofia Kenin Accepts Roger Federer's Challenge - EssentiallySports
I am Using the Racquet Roger Gave Me" - Serena Williams Takes up Roger Federer's Challenge - EssentiallySports
Federer Survives a Long Challenge From No. 49 Tipsarevic - The New York Times
Tennis Player Roger Federer Gold Challenge Coin Set for Fans As Christmas Gift | eBay
Federer challenges the History - The Tennis Base
Novak Djokovic: 'Roger Federer is ultimate challenge' - Sports Mole
Federer overcomes plucky Alves challenge | Reuters.com
