LAS VEGAS -- — Chelsea Gray had 27 points and eight assists and hit a career-high seven of Las Vegas' WNBA playoff-record 23 3-pointers and the Aces beat the Phoenix Mercury 117-80 on Saturday night to sweep the best-of-three series.

Las Vegas, which never trailed, also set WNBA playoff marks for consecutive field goals made to open a game (10) and most 3-pointers in a half (11, in the first). The top-seeded Aces beat Phoenix 79-63 on Wednesday.

Las Vegas will play the fourth-seeded Seattle Storm or the fifth-seeded Washington Mystics in the best-of-five semifinals. Seattle leads the best-of-three series with the Mystics 1-0.

Kelsey Plum added 22 points for Las Vegas.

Kaela Davis led short-handed Phoenix with 23 points, and Diamond DeShields had 21.

Phoenix was without Diana Taurasi, Skylar Diggins-Smith and Brittney Griner. Taurasi was out with a quadriceps strain, Diggins-Smith stepped away last week for personal reasons and Griner is being detained in Russia on drug charges.