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INDIAN WELLS, Calif. (CBSDFW.COM/AP) – Billie Jean King said Monday that she is selling World TeamTennis, 42 years after the sports icon co-founded the league that features men and women competing together.

King sold her majority interest in the league to Mark Ein and Fred Luddy. Ein is the founder and owner of the Washington Kastles, and Luddy owns the San Diego Aviators.

King will retain a minority stake in WTT and continue as majority owner of the Philadelphia Freedoms franchise.

Ein will become the chairman of WTT and Ilana Kloss will remain CEO and league commissioner through this year.

An advocate for gender equality, King co-founded the league in 1973 with her former husband, Larry King, who supports the changes.

Ein and Luddy plan to add four teams in major-market cities in 2018, which would bring the league to 10 teams.

Now 73, King said that she and Kloss have been talking for years about what the league’s next step would be. “It’s always been about getting the right people,” King said. “The timing was right. This is perfect.”

Since Ein founded the Washington franchise in 2008, the Kastles have won a league-best six championships, including five in a row. Luddy’s San Diego franchise won its first title last year.

“This is the easiest giving up for me that I’ve ever been through,” King said. “We know we’re passing the torch to someone who can make it much bigger and better than we can.”

As part of the deal, LionTree Partners has invested in the league along with Ein and Luddy. LionTree is expected to help attract new team owners, new media partnerships and sponsorships.

Ein is founder and CEO of Venturehouse Group LLC, and Luddy founded the enterprise cloud company ServiceNow.

The WTT season runs July 16 through August 5. Team lineups will be finalized at the roster draft on Tuesday in Indian Wells.

WTT previously had a team that played at the Four Seasons Resort and Club in Irving. The Kansas City Explorers became the Texas Wild in 2013, but moved to California in 2015. The franchise was terminated a year later.

(© Copyright 2017 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.)

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