Complex sentence: The "USTA National Tennis Center" is located in Flushing, Queens, New York and has been the home of the U.S. Open (tennis) Grand Slam tennis tournament played every year in August and September.
Split into simpler sentences: The "USTA National Tennis Center" is located in Flushing, Queens, New York and has been the home of the US. Open Grand Slam tennis tournament played every year in August and September.