WATCH: Billie Jean Kings shoots and scores in Chicago

King, a Chicago resident, was at the game primarily to promote the "Dream Gap Tour," a showcase of world-class women's hockey players.

In other tennis-to-hockey news, US Open champion Bianca Andreescu performed the ceremonial puck drop for the Toronto Maple Leafs on Saturday.

And the tennis players were good luck, it turned out, with both home teams winning in overtime: Chicago, 3-2, over the Columbus Blue Jackets, and Toronto, 4-3, versus the Boston Bruins.

Billie Jean King's still got it as an athlete—even at sports she has no experience playing.

"I've never played hockey, because I grew up in Southern California before we even had the Kings," she told the Chicago Blackhawks. "And [it was] it first time I've ever been on the ice."

That didn't stop her, though, from sliding a left-handed shot into a tiny target all the way from center faceoff dot, at the Blackhawks game on Friday.

It was a challenge that would be hard for even a pro to ace, and among the many people impressed was major Tampa Bay Lightning fan Shelby Rogers.

King, a Chicago resident, was at the game primarily to promote the "Dream Gap Tour," a showcase of world-class women's hockey players.

In other tennis-to-hockey news, US Open champion Bianca Andreescu performed the ceremonial puck drop for the Toronto Maple Leafs on Saturday.

And the tennis players were good luck, it turned out, with both home teams winning in overtime: Chicago, 3-2, over the Columbus Blue Jackets, and Toronto, 4-3, versus the Boston Bruins.