Yet she needs matches and fast - to the extent that she is considering playing mixed doubles with Britain's twice Wimbledon champion Andy Murray in an effort to get back to her best.
After successful hip surgery, And Murray will return to the Wimbledon courts. According to the Associated Press, Murray's agent, Matt Gentry confirmed the pairing after it had been reported that Murray had been looking for a mixed doubles partner and had been turned down by world No. 1 and French Open champion Ashleigh Barty. "In those situations I always wanted Jamie to win because he was the older one, like it was the natural order of things, and he is easier to handle".
"If you guys really want it, then maybe I'll do it", she added to reporters.
The star combination are drawn to play Andreas Mies of Germany and Alexa Gurachi of Chile in the opening round.
Asked about that vigorous celebration, Williams explained that she feels as if "every match counts like several matches" because she is trying to make up for lost time. "I think above all that is just fantastic".
Her story, said Williams, is a "great tale" of the value of persistence.
"He really stands out, he really speaks up about women's issues no matter what", said Williams.
Murray, 32, made headlines last week after revealing he was having trouble finding a mixed doubles partner to play with at the All England Club.
The official mixed doubles draw will be announced on Wednesday at 2 p.m. local time with play beginning later in the week.
Meanwhile a third wrote: "I really really hope this happens".
'I would put Serena in to serve first, for sure.
She also has two Grand Slam mixed doubles crowns in her collection, including one at Wimbledon, which she won with Belarusian Max Mirnyi in 1998.
To the handshake after the highlight-worthy 12-stroke exchange that capped the result, including a trade of volleys with both women at the net: "She told me I'm an wonderful player".
Andy Murray, meanwhile, has never been beyond the second round of a Grand Slam doubles competition.
Murray also plays men's doubles Thursday with Frenchman Pierre Hugues Herbert.