Shortly after the draw for the U.S. Open set up Serena Williams' path to completing a Grand Slam, she offered her own analysis.
"It's not anything simple or easy to go through," Williams said.
Actually, judging by her head-to-head records against many possible opponents, it might be.
Still, there are sure to be tests for Williams if she is going to win seven matches over two weeks once play begins in Flushing Meadows on Monday, a run that would make her 28-0 at major tournaments in 2015.
The enormity of the accomplishment, and the amount of attention, might be tough to take, let alone what problems other players may present.