By reaching 200 career wins at 21 years, 4 months and 24 days, Alcaraz is also tracking significantly ahead of two of the Big 3.
Novak Djokovic had 180 career wins at that age, eventually getting to 200 at 21 years and 9 months, and Roger Federer had 160 career wins at that age, hitting 200 at 21 years and 10 months.
However, Rafael Nadal had 247 career wins at that age—he recorded his 200th career win at 20 years and 10 months.
Alcaraz is outpacing all three in terms of Grand Slam titles, though, already having won four—meanwhile, at the same age, Nadal had three majors, Djokovic had one and Federer had none.