A serious right knee problem has prevented Roger Federer from playing consistently over the past two seasons. Suffice it to say that the Swiss phenomenon played the misery of 13 official matches in 2021, collecting nine wins and four losses.The former world number 1 reached the quarterfinals at Wimbledon, where he was clearly defeated by Hubert Hurkacz on Centre Court. A few weeks after the Championships, the 40-year-old from Basel announced that he had suffered a knee relapse and had to operate for the third time.The 20-time Grand Slam champion hopes to return to the pitch in late summer or early fall, perhaps for the Laver Cup. His longtime coach Severin Luthi has admitted it’s unlikely to see King Roger at Wimbledon this year., very bad news for the tournament and for the fans. Federer was forced to overtak …