The Sun stunned the second-seeded New York Liberty in Brooklyn to steal Game 1.
Each best-of-five series -- with a 2-2-1 format in which the higher seed hosts Games 1, 2 and, if necessary, 5 -- continues Tuesday (8 p.m. ET, ESPN).
Las Vegas is trying to become the first team to win back-to-back titles since the Los Angeles Sparks won in 2001 and 2002. The Aces were also the top seed in 2022, when they won their first championship.
Las Vegas and New York entered the season with high expectations, designated as superteams and the clear favorites. They were one of four teams -- along with the Sun and Wings -- to finish the regular season with a winning record.
Here's all the info you need for each matchup, including news and series-by-series analysis.
A'ja Wilson records 30-plus points for the second playoff game in a row as the Aces take down the Wings in Game 1.
(1) Las Vegas Aces vs. (4) Dallas Wings
Game 1: At Las Vegas 97, Dallas 83
Game 2: Dallas at Las Vegas, 10 p.m. ET Tuesday (ESPN)
Game 3: Las Vegas at Dallas, 9:30 p.m. ET, Sept. 29 (ESPN2)
Game 4*: Las Vegas as Dallas, tip TBD, Oct. 1 (TBD)
Game 5*: Dallas at Las Vegas, tip TBD, Oct. 3 (TBD)
(2) New York Liberty vs. (3) Connecticut Sun
Game 1: Connecticut 78, at New York 63
Game 2: Connecticut at New York, 8 p.m. ET Tuesday (ESPN)
Game 3: New York at Connecticut, 7:30 p.m. ET, Sept. 29 (ESPN2)
Game 4*: New York at Connecticut, tip TBD, Oct. 1 (TBD)
Game 5*: Connecticut at New York, tip TBD, Oct. 3 (TBD)
A'ja Wilson dominates with 38 points and 16 rebounds as the Aces sweep the Sky to advance to the WNBA semifinals.
(1) Las Vegas Aces defeat (8) Chicago Sky 2-0
Breanna Stewart drains a jumper late in the fourth to hype up the home crowd.
(2) New York Liberty defeat (7) Washington Mystics 2-0
Napheesa Collier grabs her own rebound and drains the dagger to secure the Game 2 victory for the Lynx.
(3) Connecticut Sun vs. (6) Minnesota Lynx
Arike Ogunbowale increases the Wings' lead with a 3-pointer in the fourth.