Sam Querrey's Grand Slam success has come slowly, really slowly, but he's winning the race. His semifinal run at Wimbledon was a first for the American, and now he's into the US Open quarterfinals with a demolition of Mischa Zverev on Sunday night.

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Here's a look at Querrey's rise to No. 1-ranked American by the numbers:

55

That's how many winners Querrey struck on Sunday night against Zverev. He committed just eight unforced errors.

42

On Querrey's 42nd Grand Slam attempt, he finally broke through, reaching the semifinals of Wimbledon with an upset over Andy Murray.

29

Querrey's age.

"I hope I've got, whatever, five, six years left in me," Querrey said. "I wouldn't consider myself a late-bloomer. I've been decent for 10 years. I'm hoping I can kind of continue having more years like this into my 30s."

27

His ranking heading into the US Open

16

Querrey has lost 16 times this season, and racked up 34 wins. He has won 16 of his last 19 matches.

15

Querrey's projected ranking with his quarterfinal appearance this week.

11

The American turned pro in 11 years ago in 2006 when he was 18 years old. That's also the last year America had a male in the semifinals of the US Open (Andy Roddick).

10

Querrey has collected 10 ATP titles during his career, including two this year (Los Cabos and Acapulco).

9

Querrey won his first ATP title in Las Vegas nine years ago back in 2008.

6

The last time an American reached the quarterfinals at the US Open was six years ago in 2011 (Roddick and John Isner).

5

Querrey dropped just five games in his US Open fourth-round 6-2, 6-2, 6-1 win over Zverev.

"I didn't have a good feeling until I hit a couple balls in the warmup. A little nervous, first night match out there," Querrey said. "[I] had a good service game right off the bat. I think I broke first game of his serve, when he served. That just loosened me up right away. Felt great from there going forward."

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2

Querrey leads by two in career-head-to-head matches against his quarterfinal opponent Kevin Anderson (8-6).

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1

Querrey is officially the No. 1-ranked American for the first time in his career.