Jennifer Gillom scored 29 points as the Phoenix Mercury beat the visiting Los Angeles Sparks, 73-68, last night to win the Western Conference title.
In Thursday semifinals, Charlotte (15-13) visits Houston (18-10), the Eastern Conference winner at 7:30, and Phoenix (16-12) hosts New York (17-11) at 9:30 p.m.
The league championship will be held on Saturday at 4 p.m.
New York, which finished second in the East, closed out its season with a 79-72 overtime win over Cleveland before 18,051 fans at Madison Square Garden last night. Charlotte, which finished third in the East, defeated visiting Utah, 70-52, while host Houston lost, 68-58, to Sacramento.