Becky Hammon put home the go-ahead bucket with 1:05 to play and the San Antonio Silver Stars held on for an 82-81 victory over the Phoenix Mercury on Tuesday.
Hammon finished with 22 points, while Danielle Adams paced the Silver Stars with 24 points and six rebounds in their fourth consecutive win.
DeWanna Bonner scored a game-high 38 points and pulled down eight rebounds in the Mercury's second consecutive defeat.
With the game tied at 75, Hammon drove hard to the right, put home the layup and was fouled. She sank the ensuing free throw to give the Silver Stars a 78-75 lead.
Bonner fired a three-pointer at the other end that was off the mark. Charde Houston came down with the offensive rebound for the Mercury, but missed the put-back attempt and was forced to foul Adams.
Hammon stepped to the line and made a pair of free throws to extend the lead to five with 38.5 seconds to play.
Following a timeout, Alexis Hornbuckle drained a three-pointer to cut the deficit to two. Hammon made two more free throws with 2.4 seconds to play following an offensive board by Sophia Young. Bonner made a trey at the buzzer for Phoenix as it fell to 4-11 on the season.