Grigor Dimitrov

The 'Baby Fed' tag followed Dimitrov for years, and it wasn't entirely fair, though you can see where it came from. He was world No. 1 as a junior, won the Wimbledon and US Open boys' titles, and had a one-hander that looked lifted from a Federer highlight reel. He built his own career anyway, winning Cincinnati and the ATP Finals in 2017, reaching a career high of 3 and making the semi-finals at three different Slams. His nine titles came on every surface, and when the backhand is flowing it's one of the prettiest shots in the sport.