
Imagine if they could bottle a potion called “Just Serena.”
That was Serena Williams’ succinct, smiling explanation for how she’d managed — at nearly 41, and match-rusty — to defeat the world’s second-ranked player and advance Wednesday to the third round of a U.S. Open that so far, doesn’t feel much like a farewell. “I’m just Serena,” she said, to roaring fans.