Elena Delle Donne forced overtime with a clutch 3-pointer and had a career-high 32 points to lead the Chicago Sky to a 94-86 victory over Minnesota on Sunday.
Delle Donne added five points in the extra period for East-leading Chicago (15-7) while Sylvia Fowles added 31, including six in the extra session.
Seimone Augustus led a balanced Lynx attack with 26 points, Maya Moore had 19 while Lindsay Whalen and Rebekkah Brunson had 16 and 14 points, respectively.
Courtney Vandersloot had 13 and Epiphanny Prince added 10 for Chicago.
The Sky rallied from a 12-point second-half deficit to lead in the late going before Augustus' go-ahead jumper with 47.3 seconds left in regulation gave the Lynx a 77-76 lead.
Whalen made it 79-76 with two free throws before Delle Donne's game-tying 3-pointer.
The loss was the second straight for Minnesota (17-5), which had a 10-game winning streak snapped last Thursday against Washington.
The teams were a combined 48-for-50 from the free throw line on Sunday. Chicago missed two shots in overtime.