First the good news for American men’s tennis. Sam Querrey is still alive in the U.S. Open, through to the fourth round, after holding off the world’s 138th-ranked player, Radu Albot of Moldova, 4-6, 6-2, 6-4, 6-4, on Friday.

Now the rest of the news. The other 18 Americans entered in the tournament all were run through the shredder in just five days, the most recent being their top seed. No. 10 John Isner Friday night was run out of town by Germany’s Mischa Zverev — the lesser of the Brothers Zverev — 6-4, 6-3, 7-6 (5).

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The Isner loss took only two hours and seven minutes. Action typically consisted of a serve (maybe, if it wasn’t a fault); a return (maybe, if it wasn’t netted or sent wide); a groundstroke (possibly, if it was from Isner); a volley (for sure, if it came from the constantly charging Zverev, who won 74 points on serve-and-volley.)

There were only eight rallies of more than nine shots. There were 161 rallies — if “rally” is the right word — of four shots or fewer. Isner was a step slow throughout, guilty of 41 unforced errors, compared with Zverev’s seven.

At 30, the 23rd-seeded Zverev is having his best year in a career filled with wrist, rib and knee injuries, and shocked Andy Murray at this year’s Australian Open. Mostly, he has come to the public’s attention as the older brother, by 10 years, of Sasha, who was seeded fourth at Flushing Meadows but was upset in the second round.

They are sons of a former member of the Soviet Union’s Davis Cup team who immigrated to Germany in 1991. “I was expecting Sasha to be in the fourth round or quarterfinals here,” Mischa admitted. “Not me.”

So Isner, who has advanced past the third round only three times in 11 Opens — and only seven times in 37 major appearances — the analysis was simple. “I just couldn’t pass him, is what it comes down to,” he said. “And I struggle at night here. I don’t think I’ve won a match at night here. But, look, he beat me.”