By A Mystery Man Writer
A Career Grand Slam is a rare feat in tennis.
Djokovic breaks Steffi Graf tennis record for most weeks ranked No. 1
Rafael Nadal, Biography, Titles, & Facts
4 players who have won the Triple Career Grand Slam, ft. Steffi Graf, Novak Djokovic
Novak Djokovic surpasses Steffi Graf with record 378th week as world No. 1
Top ten most Grand Slam tennis wins: Novak Djokovic, Serena Williams and Rafael Nadal but no Bjorn Borg or Billie Jean King
The Sunshine Double: All the players who've won Indian Wells and Miami in the same year
Novak Djokovic overtakes Steffi Graf to claim historic all-time rankings record, Tennis News
16) Alexander Zverev told Novak Djokovic he's the greatest of all time after beating him
Novak Djokovic's Grand Slam titles, tennis records and stats
What is a Grand Slam in tennis and how many players have won it?
Novak Djokovic - Wikipedia