FLOTUS tells Serena Williams she's 'so proud' after US Open loss
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Michelle ObamaMichelle LeVaughn Robinson ObamaMichelle Obama book tour fetching steep ticket prices Michelle Obama warns against voter apathy in new PSA Michelle Obama adds dates to book tour 'due to overwhelming fan demand' MORE is offering tennis great Serena Williams her condolences following the world No. 1’s stunning upset at the U.S. Open.

Williams, who was two matches away from a rare calendar Grand Slam, lost to Italy’s unseeded Roberta Vinci in the semifinals on Friday.

But the 21-time Slam champion quickly earned the praise of the first lady after the devastating loss:

Obama, a tennis fan, has touted the health benefits of the sport despite not being exposed to it herself as a young girl growing up in Chicago.

“It's a great way to stay healthy, to stay fit. It's a lifelong sport, it's something I've tried to tell my kids — I forced them into playing tennis because I didn't want them to be like me, but it's a great way to stay active," Obama said in 2013.

Earlier this summer, Obama congratulated Williams for capturing her sixth Wimbledon title, tweeting, “We’re all so proud of you!”