Nneka Ogwumike had 23 points and nine rebounds, Liz Cambage added 19 points and seven rebounds, and the Sparks beat the Phoenix Mercury 78-75 on Monday night.
Los Angeles (10-11) has won three straight, including an 84-74 victory over New York on Sunday.
Jordin Canada made two free throws with 35.3 seconds left to give Los Angeles a two-possession lead. Diana Taurasi made two free throws at the other end after being fouled on a drive into the lane.
Ogwumike had a baseline jumper roll out with 9.6 seconds left and Taurasi failed to hit the rim on a three-point try for Phoenix. But Ogwumike grabbed the rebound and made one of two free throws for a three-point lead. Skylar Diggins-Smith was off the mark on a heave from midcourt at the buzzer.
Lexie Brown added 14 points, and Canada and Katie Lou Samuelson each added 10 points for Los Angeles.
Diggins-Smith led Phoenix (9-14) with 22 points. Taurasi had 13 points and six assists, and Sophie Cunningham and Shey Peddy each scored 10.
This story originally appeared in Los Angeles Times.