Roberta Vinci
She says she's "ready for anyone every time."
This is the first time SI has chosen an individual female athlete since 1983.
The victory comes just one day after Vinci stunned Serena Williams in the semifinals.
We shouldn't let Williams' loss on Friday diminish what she just accomplished.
WHAT'S HAPPENING
We're upset at the upset, but not at these amazing shots.
The underdog has ended Williams' quest for a calendar-year Grand Slam.