Wow. Sinner's turnaround is even bigger than Federer's was.
Federer vs top-5, pre-peak(beginning of career until October of 2003) vs peak(Masters Cup 2003 through Dubai of 2007)
prepeak: 9-10, .474
peak: 29-6, .829(4 of those losses were to Nadal on clay--Nadal was undefeated to everybody on clay during this timeframe=81 match winning streak on clay).