SEATTLE, July 13 (Ticker) -- Rookie Temeka Johnson proved pivotal in ending the Washington Mystics' struggles at KeyArena.

Johnson scored two big baskets in the final two minutes to help the Mystics capture their first win here in four games with a 78-71 victory over the Seattle Storm.

On-Demand Video from Mystics-Storm: Play

In a back-and-forth affair, Washington (9-8) took a 73-69 lead with 1:36 remaining when Delisha Milton-Jones stole the ball from Sue Bird and passed to Johnson, who streaked up the court for a layup.

After Seattle (8-10) answered on a jumper by Iziane Castro Marques, Johnson buried a jumper over Bird as the shot clock expired to make it 75-71 with 37 seconds left.

Bird, who scored all 16 of her points in the second half, then missed a jumper that Johnson rebounded and Charlotte Smith-Taylor was fouled. She made 1-of-2 free throws for a 76-71 edge with 15 seconds to play.

Johnson had 12 points and four assists and Alana Beard and Milton-Jones scored 15 apiece for the Mystics, who completed their first season sweep of the Storm since 2001.

Castro Marques tied a season high with 19 points and Lauren Jackson added 17 and eight rebounds for Seattle, which lost for the sixth time in its last seven games.