Roger Federer inspires Novak, Coco, Sofia, and more to join the "Roger Federer Challenge" | What happens when Roger Federer starts a challenge? Novak Djokovic does it. Coco Gauff does it. Sonya
![Roger Federer: Dominic Thiem acknowledges HUGE Halle Open challenge | Tennis | Sport | Express.co.uk Roger Federer: Dominic Thiem acknowledges HUGE Halle Open challenge | Tennis | Sport | Express.co.uk](https://cdn.images.express.co.uk/img/dynamic/72/590x/Roger-Federer-976754.jpg?r=1533648831136)
Roger Federer: Dominic Thiem acknowledges HUGE Halle Open challenge | Tennis | Sport | Express.co.uk
![Alcaraz challenges Federer after US Open win; fires warning to Nadal, Djokovic | Tennis News - Hindustan Times Alcaraz challenges Federer after US Open win; fires warning to Nadal, Djokovic | Tennis News - Hindustan Times](https://images.hindustantimes.com/img/2022/09/13/1600x900/New_Project_-_2022-09-13T214557.869_1663085830304_1663085842705_1663085842705.jpg)
Alcaraz challenges Federer after US Open win; fires warning to Nadal, Djokovic | Tennis News - Hindustan Times
![Roger Federer in surprise Rafael Nadal admission as he aims to win ninth Wimbledon title | Tennis | Sport | Express.co.uk Roger Federer in surprise Rafael Nadal admission as he aims to win ninth Wimbledon title | Tennis | Sport | Express.co.uk](https://cdn.images.express.co.uk/img/dynamic/72/590x/Roger-Federer-struggled-to-cope-with-Rafael-Nadal-s-challenge-to-his-dominance-1146919.jpg?r=1561809944665)