He had a completely different racquet in his prime. Honestly, I'm 100% confident he'd have a lot more slams now if he used his current racquet the last 12 years or so. Much bigger sweet spot and way less shanks and more power, both of which he was conning himself out of for years. Right, so Federer can only beat poor old Nadal. Same for Djokovic I guess
There you have it everyone. Read this post. Age is NOT only an issue apparently when it comes to Federer. Incidentally, the ancient Nadal of 2017 was a geriatric 31. Truly ancient. Please...
It does take a lot of time to adjust to a new racquet given these guys have such a long season. The main thing was Ljubicic making him hit through the ball more on his backhand and he had 6+ months to do that in 2016 due to injury layoff. When exactly are you supposed to otherwise get 6+ straight months to practice ?