And it has resulted in an offer from Greek professional player Petros Tsitsipas for a mixed double match in the future.
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Lehmann is currently away on international duty with Switzerland, where she relaxed in her downtime by picking up a racket.
The ex-West Ham star shared multiple snaps of herself to her adoring 11.8 million Instagram followers alongside Swiss teammates Geraldine Reuteler and Rachel Rinast.
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Captioning the upload, she simply stated: "Something different."
Her post quickly garnered the attention of Tsitsipas - brother of current world No.3 Stefanos.
Making his presence known in her comment section, Petros said: "Let's play mixed?"
His message was followed by the eyes and tennis racket emoji, but Lehmann is yet to reply to his challenge.
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Unlike his brother who specialises in tennis singles, Petros, 22, features predominantly on the doubles circuit.
Though Stefanos made a similar offer to actor Margot Robbie at the Australian Open in January after his quarter-final win.
Petros, meanwhile, is yet to progress past the second round of a Grand Slam, with the Tsitsipas brothers crashing out early in the Australian Open last month.
In a recent interview with talkSPORT, Lehmann, who has scored once in the Women's Super League this season, declared she is looking to boost the profile of women's football through her social media following.
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She said: "I don't think you can compare like anything between women's and men's football because it's just so different how people look at us and how people look at them.
"It's just not the same. Women's football is always second class. I don't think you'll ever be first class because I think a lot of people still think that men's football is the first priority.
"They don't think about women's football and I think that's a big problem. Now social media is really helpful because people actually see, oh, we play football, we can play football.
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"When they come to their first game, after they say 'oh it's not even that bad' they're surprised but people judge before they even saw the actual game."
"But will things ever be equal? I don't think this will ever happen to be honest, maybe in the next 100 years but we will not be here anymore.
"I hope that in the summer when we play the World Cup it's a big, big thing. I hope that will push women's football more forward.
"We just need to live in the moment and appreciate what we have now and obviously grow it."