Tamera Young scored 16 points and Sylvia Fowles added 13 points and 15 rebounds as the Sky won a playoff series for the first time in franchise history. Chicago was swept by Indiana in the first round last year in the Sky’s first postseason appearance.
The road team won each game in this best-of-three series, with Chicago taking the opener 80-77 last Friday, and Atlanta winning 92-83 in Game 2 on Sunday.
The Sky will visit the Fever for the opener of the East finals on Saturday.
Erika de Souza scored 18 points and Angel McCoughtry had 17 for Atlanta, which reached the WNBA Finals in three of the last four seasons.
Chicago trailed 44-24 about midway through the second quarter and was down 72-55 with 8:12 remaining. Delle Donne then scored 13 points during the Sky’s 19-2 run that tied the score at 74-all on her 3-pointer with 3:33 to go.
The Dream shot 1 for 6 from the field with three turnovers during Chicago’s big run before de Souza and McCoughtry made baskets 20 seconds apart to put the Dream up four with 2:14 to go.
Shoni Schimmel’s jumper gave Atlanta an 80-77 lead with 29 seconds left, but Delle Donne made two jumpers in the last 24 seconds — with the final basket giving Chicago its first lead since 6-5.
The Sky, who trailed by 16 after three quarters, became the first team to rally from such a deficit in a playoff game since the WNBA went to four quarters in 2006, according to information provided by the league from the Elias Sports Bureau. It’s been done three times in regular-season games.