Carlos Alcaraz — with a new buzz cut — was a buzzsaw against Reilly Opelka, cutting down the huge American 6-4, 7-5, 6-4 in the first round of the U.S. Open.

As it turns out, the close-cropped look was a familial fluke more than a fashion statement.

“I just wanted to get a haircut and suddenly my brother just misunderstood the machine. The only way to fix it is just to shave it off. And it just became this haircut. To be honest, it’s not that good,” said Alcaraz, quickly correcting himself to “[I mean] it’s not that bad, I guess.”

Freudian slip. 3

But the Spaniard had no slips on the court.

Alcaraz hit 23 winners against just 17 unforced errors.

He won a stellar 86 percent of his first service points against Opelka — one of the best servers on the entire tour — and didn’t lose a

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