If Novak Djokovic wins the US Open 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. “I’d be very happy to shake his hand if he can win the four Slams. I’d be happy for him to be a part of—whether it’s a ‘club’ or not, I don’t know,” Laver said with a chuckle during an interview with The Associated Press.