Updated at 4:08 p.m.

Correction: Serena Williams, not Venus, was on the court in the bright pink unitard today. Her agent, Jill Smoller, confirmed to the Associated Press that Williams was working out a bit.

“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 said in an email.

Filed at 1:30 p.m.

Serena Williams, whose return to tennis is uncertain because of blood clots that were “the scariest moment of my life,” is at least back on a court.

She was serving as a photographer, tweeting a photo of what she promised was “cool news,” her sister practicing as she recovers from an injury suffered in the Australian Open.

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

And, boy, is that ever a pink unitard.

She gave a bit of an update on her own progress from blood clots. “Back on the shakes. And mental rehab. Looking into lobotomy options today... Lol (seriously),” she tweeted. This comes after her Monday promise: “My life change starts today. Healthy living both physically and spiritually. #focused”

Because she is taking blood thinners, she isn’t expected to play tennis again until this summer. “Every day is better and better,” Williams told the “Today” show in March. “I’m just working on trying to make sure I can keep my energy up. I'm not doing much. I haven't really left the house much recently. ... I still have several clots in my lung and they're just there. They have to eventually dissolve, so I'm just taking it one day at a time.”