PHOENIX — Kahleah Copper scored 28 points on her 31st birthday against her former team, Natasha Mack had her first career double-double with 10 points and 12 rebounds and the Phoenix Mercury edged the Chicago Sky 83-79 on Thursday night.

In the last minute, Mack had two offensive rebounds and her career-high fifth block, Alyssa Thomas had two offensive rebounds and a basket and Satou Sabally clinched it with two free throws with six seconds left.

Thomas had 15 points and nine rebounds as the Mercury (24-14), in front of its 15th sellout, won its third straight, fifth of six and moved into a tie for third with six games to play.

The Mercury had 17 steals and 11 blocks and dealt the Sky (9-29) their 16th loss in 18 games.

Kia Nurse was 6-of-8 shooting with five 3-pointers to lead the S

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