Nneka Ogwumike scored a career-high 35 points in a loss. Younger sister Chiney Ogwumike underwent dental surgery and missed her team's loss on Tuesday.
The elder Ogwumike scored 24 points in the first half but the Tulsa Shock beat the host Los Angeles Sparks, 96-90, in a WNBA game.
"I was just shooting, really," Ogwumike said. "My teammates found me, and I've been working on my shot a lot more now, and I'm a little bit more comfortable especially with the confidence that my teammates give me."
The Sparks (13-16) could have clinched a playoff spot with a victory. The Shock kept their playoff hopes alive.
Ogwumike surpassed her previous high point game when she completed a three-point play and converted an alley-oop pass from Candace Parker, who had 28 points and nine assists.
The Sparks trailed for most of the third quarter but scored the final six points, on four Parker free throws and a Lindsey Harding jumper, to take a 68-66 lead.
Tulsa was up by 12 points with 45 seconds remaining and the Sparks closed the gap to 95-90 with five seconds remaining.
The Connecticut Sun, minus Chiney, dropped an 82-66 decision to the visiting Chicago Sky. The Sun led, 41-36, at halftime.