Sebastian Korda has been compared to former world number one Andy Roddick by Miami tournament director James Blake.
American men's tennis has been in the doldrums since Roddick's peak, with John Isner the best they have managed to produce in recent times.
Players such as Frances Tiafoe, Reilly Opelka, and Taylor Fritz have sporadically impressed and climbed the rankings, but America have been starved of any star power on the ATP Tour for too long.
However, Korda looked very much the part in his run to the Miami quarterfinals, and Blake says Americans should be genuinely excited about the 20-year-old.
"Seeing four Americans in the Round of 16... first time in a long time for that," Blake told the ATP.
"Seb Korda, I mean what he's been doing is absolutely incredible, just 20 years old and really sort of rising to the occasion.
"To me it reminds me of when Andy Roddick burst onto the scene here beating Pete Sampras in the Miami Open many years ago.
"[It was] his welcome to the world of being a top player. I think for Seb Korda that's happening to him.
"He's been talked about for the last year or so as someone that could break through, and here he's done it on one of the biggest stages and I think he's gonna ride that, he doesn't look phased by it."
Korda's exploits in Miami saw him jump 23 places in the world rankings to a career high 64.
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