On Sunday, Rory McIlroy was complimenting Carlos Alcaraz's new haircut. On Monday, Alcaraz mimic'd McIlroy's golf swing after his first-round win.

Carlos Alcaraz showed up at the U.S. Open on Monday for his first-round match with a new look: a shaved head. Alcaraz, who is seeded No. 2 at Flushing Meadows, caused a bit of a buzz with his buzz cut when he got to the tournament grounds before heading out to beat big-serving Reilly Opelka 6-4,

The five-time Grand Slam winner got slammed by one foe for his new style, but there's a funny story behind it.