If Novak Djokovic wins the U.S. Open two weeks from now to complete the first calendar-year Grand Slam in men’s tennis since 1969, “Rocket” Rod Laver will be there to welcome him into a remarkably exclusive group.

If Novak Djokovic wins the U.S. Open two weeks from now to complete the first calendar-year Grand Slam in men’s tennis since 1969, “Rocket” Rod Laver will be there to welcome him into a remarkably exclusive group.