Complex sentence: A United States resident since 1994, Sharapova has competed on the WTA tour since 2001.The WTA has ranked her world No.1 in singles on five separate occasions, for a total of 21 weeks.
Split into simpler sentences: A United States resident since 1994, Sharapova has competed on the WTA tour since 2001. She has been ranked world No.1 in singles by the WTA on five separate occasions, for a total of 21 weeks.