NEW YORK—After double-faulting to fall behind two sets to none—a deficit he’s never overcome—in the second round of the U.S. Open on Thursday night, Carlos Alcaraz slung his equipment bag over a shoulder and trudged toward the locker room.
Glancing in the direction of his coach, 2003 French Open champion Juan Carlos Ferrero, Alcaraz pointed his right index finger at his temple, then wagged that finger, as if to say, “I’m not thinking straight.”