Tina Thompson had 17 points and 11 rebounds and Tanisha Wright added 16 points and the Seattle Storm earned a 69-63 victory over the San Antonio Silver Stars on Sunday.
Wright's two free throws with 10.9 seconds left made it a two-possession game.
Camille Little also had a double-double for Seattle (10-12), scoring 11 points and grabbing 10 rebounds.
Jia Perkins had 19 points for the Silver Stars (8-15), and Jayne Appel had a double-double with 11 points and 16 rebounds.
The Storm, in the Western Conference's fourth and final playoff spot, regained a 2½-game lead on fifth-place San Antonio after being routed 77-56 by the Silver Stars on Friday night.