The last two seasons have not been good for Roger Federer. The former world number 1 took to the track with a dropper, after having to deal with a serious injury to his right knee. Suffice it to say that the Swiss maestro only played 13 official matches in 2021, with nine wins and four losses.A poor balance for a legend of his caliber, only partially mitigated by the quarterfinals achieved at Wimbledon. A few weeks after the championship, the Swiss announced that he had suffered a relapse in the knee and that he had to undergo surgery for the third time …