Every time Serena Williams enters a Grand Slam, the reductionist take is that it's "Serena vs. The Field," that Williams is the only one with a legitimate shot at the title, and that beyond her it's anyone's guess.
While that's usually unfair to the other players, this US Open, the Serena-against-the-world outlook feels apt.
Following the fourth-round elimination of Ashleigh Barty and Naomi Osaka, Williams is the only Grand Slam champion left. In fact, New York Times tennis correspondent Christopher Clarey points out, Serena's the only one remaining to have ever even made a major final—and she's made (and won) a whole lot of them.