NEW YORK— A solid gold shoelace tag, 400 hand-set diamonds and a diamond-laden “Swoosh” logo—and that’s just ... six layers—one for each of her US Open titles.

“In case you can[‘t] find court 5, this is where I play my first match Monday followed by 11:00,” tweeted the 20-year-old, who is currently at a career-high ranking in his third US Open ...