Williams sets female athlete mark: $23 million, a record for career prize money by a female athlete. Not bad for someone who collected her first check of $240 from a tennis event in Canada in 1995. More here.
Just a side note: I'm tempted to think that $23 million pales in comparison with Manny Pacquiao's boxing prize money in his last bout. That said, I think it's unfair to call him ₱acquiao.