The Miami Masters Series tournament is considered the 5th slam by many. However, the tennis masters cup at the end of the season pits the worlds top 8 together in a round robin event.
U.s. Open
The Grand Slam is a tennis tournament, while the ATP is an orginization. (Association of Tennis Professionals.)
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Australian open
us open
The USTA Southern Section League tennis Sectional tournament held at the Mobile Tennis Center featuering 60 tennis courts and over one thousand participants
strawberries
The Australian Open
US Open
Australian open
11 hours and 5 minutes.