No rivalry in tennis history is as popular as Rafael Nadal and Roger Federer. For almost 15 years, the two have graced fans with some of the greatest matches in history, while being friends and developing a mutual respect for each other (even going to each other's charity events).

With the 2019 Laver Cup already picking up hype—largely because Federer and Nadal will be playing on the same team—now is the perfect time to take a look back at their historic rivalry, from their first match to their head-to-head stats (SPOILER: Nadal has a lead over Federer in most categories).

See just how much you know about the duo: