Serena Williams back at work!

Serena Williams is back at work.

The sports superstar returned to the tennis court Tuesday, which she said was her “first day back” after a series of health problems, including blood clots in her lung.

The 13-time Grand Slam singles champion and former No. 1-ranked player has not played an official match since she won the title at Wimbledon in July.

“Cool news guys stay tuned.. Ill update u with a pic.. U ready??” she wrote on Twitter.

“Look who I spotted on the court. Her first day back…”

Her agent, Jill Smoller, confirmed Williams put in some work Tuesday.

“She was out hitting some balls today. Taking it day by day depending on how she’s feeling and was very happy to be back on the court,” Smoller wrote in an email to The Associated Press.

Williams has previously revealed that she’s looking to settle down with the man of her dreams.

“I’m looking for a guy who is close to his parents his mom mostly because you can learn a lot about a guy by the way he treats his mom,” she said last month.

“And someone who loves themselves because if they take care of themselves, they are able to take care of you.

“I don’t like smokers, and of course people who disrespect their parents and families. Family is very important to me.

“When people meet me, I’m different in person I’m very nice and easy going.”