Each line on the charts below represents the ranking of a player who was, at some point, number one in the world.

This is very much incomplete, but it's sat unfinished for months. Time to publish and be done with it.

Data is scraped from the WTA and ATP tours, for women and men, respectively. (There is no unified organization for professional tennis.) The full scraped dataset is available on Github.

Women's Singles

Men's Singles