Roger Federer has had a very discreet role in the last two years. The Swiss has had to deal with a serious injury to his right knee, which has considerably limited his appearances on the pitch. Suffice it to say that the 40-year-old from Basel only played 13 official matches in 2021, with nine wins and four losses.Wimbledon and the Tokyo Olympics were his main goals, but the Swiss never managed to find the ideal condition. Following a tough loss to Hubert Hurkacz in the London quarterfinals, the former World No. 1 announced that he had suffered a relapse in his knee a …