Sara Errani

From Sharapova to 'Fedal,' a look at key US Open topics

There are those who think Maria Sharapova shouldn't even be in the U.S. Open via a wild-card invitation, because what dropped her ranking out of the top 100 was not an injury but a 15-month suspension for doping.

"You have to work for it, you know, a little bit to go and play your tournaments and not (get) help that much sometimes," Wimbledon champion Garbine Muguruza said. "You've got to work hard and deserve it again. I think that's the way."

Either way, as long as Sharapova remains in the field at the tournament that begins Monday, she will be a main topic of conversation. On the other hand, the former No. 1 and five-time major champion could be gone...