Couldn't Hingis stick to doubles for Charity?
Although like many others I'm finding it hard to believe that Hingis has in mind a comeback to singles, I really don't see why she'd enter a singles event simply to raise money for charity.
There's many ways she could raise money, and if she had to play tennis, surely she'd do it on a beach, or with kids, or with Pamela Shriver as some big joke.
Why enter a competitive tour event? It just doesn't add up.
My guess is she's indeed doing this for charity, but in the back of her mind she's testing just what she's capable of and longs to return to the tour.