Has another player yet to complete the Grand Slam in singles twice in the Open Era?
No
Yes
Answer
No. Since the Open Era began in 1968, only three male players have completed the Grand Slam in singles twice. Rod Laver did it in 1962 and 1969, and Novak Djokovic did it in 2015 and 2016. Roger Federer has come close, but he has never won the French Open.
Master of the Court: A Quiz on Rod Laver's Tennis Legacy