Chicago stayed perfect at home and the Los Angeles Sparks remained winless on the road as the Sky claimed a 94-82 WNBA victory on Saturday night at Allstate Arena.
Epiphanny Prince scored 21 points and Elena Delle Donne added 20 points and eight rebounds as Chicago (7-3) won its third straight and boosted its record at home to 5-0, matching the best home start at home since 2009.
Courtney Vandersloot added 12 points and Swin Cash 10 for Chicago.
Sky center Sylvia Fowles scored 17 first-half points but left the game just before halftime with a right ankle injury and did not play again.
The Sparks (5-4) dropped to 0-4 on the road despite a game-high 23 points from Candace Parker, who starred in high school in the Chicago area. Nneka Ogwumike had 13 points, Alana Beard 11 and Jantel Lavender 10 for Los Angeles.
The Sky led much of the game and were up 67-62 to open the fourth quarter.
The Sparks rallied and cut the lead to 70-68 on a Parker layup with eight minutes left, but the Sky weathered the surge and restored a double-digit lead at 84-73 less than six minutes later on a Delle Donne driving layup.
Chicago plays host to Seattle on Tuesday and Los Angeles returns to home to face Minnesota.