Now, however, Us Weekly is reporting that Serena is hooking up with a lesser-known - but no less successful - new boo.
The tabloid claims that Serena is dating Alexis Ohanian - the 32-year-old Internet entrepreneur who's best known as the co-founder of social news site Reddit.
Apparently, the new couple met at a lunch for successful young people and immediately hit it off - even though Ohanian is not a tennis fan.
"He said he'd never been into tennis until they started dating," a source tells Us.
The same source says that the couple is already so inseparable that Ohanian has started joining Williams for her training sessions.
The insider claims that during a recent workout, “[Ohanian] called her babe and they held hands."
So should we expect a weepy, auto-tuned breakup ballad from Drake? Did Serena dump him for being unfaithful, as she reportedly threatened to?
Nah, apparently it's nothing quite so dramatic. The source says the relationship between Drizzy and Serena was never anything more than a "flirty friendship."
We don't care what anyone says. We still think she blames the dude for her loss against Roberta Vinci.