World Number One, Novak Djokovic is just one grand slam away from winning the calendar grand slam!
Let's have a look back at the five tennis players who have reached this feat in the past.
In 1938, Don Budge become one of the most powerful players in the decade as he won the calender grand slam.
Credits: YoutubeUSOpenTennisChampionships
Maureen Connolly became the first woman to win the calendar grand slam in 1953.
Credits: YoutubeUSOpenTennisChampionships
Rod Laver clinched the calendar grand slam in 1962 and 1969.
Credits: YoutubeUSOpenTennisChampionships
In 1970, Margaret Court became the second woman to win the calendar grand slam.
Credits: YoutubeUSOpenTennisChampionships
In 1988, Steffi Graf became the third woman and fifth tennis player to win the calender grand slam.
Credits: YoutubeUSOpenTennisChampionships