Commonality between Federer, Nadal, Sampras, and Borg
I am surprised that no one has ever brought this up. This blew my mind.
At one point in the career, Federer, Nadal, Sampras, and Borg were all 10-2 in Grand Slam singles finals.
After that, Federer went 7-5, Nadal went 1-3, Sampras went 4-2, and Borg went 1-3.