Despite being away from the circuit for some time, Roger Federer continues to be a source of inspiration for his younger colleagues. The last two seasons have been very complicated for the Swiss phenomenon, struggling with a serious injury to his right knee.The former world number 1 played just 13 official matches in 2021, racking up nine wins and four losses. After reaching the quarterfinals at Wimbledon, the King had to miss the Tokyo Olympics due to a knee relapse. The 20-time Grand Slam champion had to operate for the third time in 18 months, but he never gave up on …