After undergoing yet another surgery on his right knee, Roger Federer hopes to return to the pitch in late summer or early autumn. The Swiss champion has already made official his presence at the Laver Cup, scheduled at the O2 Arena in London at the end of September.In that circumstance, the former world number 1 is expected to team up with his great friend and rival Rafael Nadal. The last two seasons have been particularly difficult for the King. Just think that Roger played just 13 official matches last year, racking up nine wins and four losses.His 2021 ended at Wimbledon, where …