Dallas had an ultimately disappointing 2020 WNBA season, finishing ninth in the 12-team league and missing out on the playoffs.
On Wednesday they announced they would be moving forward with former player Johnson as their head coach.
Johnson, a two-time WNBA all-star (1999, 2001), steps up to the role from the Las Vegas Aces, where she was assistant coach.
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The Aces had the best record last season, making it to the 2020 WNBA Finals where they lost to Seattle Storm.
"I am excited to be able to work with a promising group of young and talented players," Johnson said.
"My goal is to build a strong foundation and a championship team. I know that it will take time, hard work and dedication, and I am up for the challenge.
"I have established Dallas as my home base since 2004 and I have been an active member of this community.
"I am now thrilled to be able to coach in the city that I love.“
