The Mystics advanced to the Eastern Conference Finals for the first time and will meet the winner of the series between the New York Liberty and Indiana Fever.
With stars such as Chamique Holdsclaw of the Mystics and Allison Feaster and Andrea Stinson of Charlotte on the floor, it was Miller who took control down the stretch, scoring 12 of Washington's last 14 points.
Honored Thursday as the league's Most Improved Player after averaging 9.3 points during the regular season, Miller was the difference in this series. She scored 12 points in the series opener on Thursday and was unstoppable in the second half in the clinching win.