US Open: No. 12 Taylor Fritz upends No. 4 Alexander Zverev, is second American in semifinals

Fritz wins 6-3, 6-7, 6-3, 6-2 to reach semifinals

Tommy Paul also advances to semis, making it the first time in 16 years that two American men have made the final four at the US Open.

Taylor Fritz upset fourth-seeded Alexander Zverev in four sets Wednesday night to become the second American man to reach the semifinals of the US Open.

Fritz, seeded 12th, won 6-3, 6-7 (3), 6-3, 6-2 in 2 hours, 34 minutes at Arthur Ashe Stadium.

Fritz is the first American man to reach the semifinals of the US Open since Andy Roddick in 2006.

Fritz will face No. 2 seed Rafael Nadal in the semifinals on Friday.

Earlier Wednesday, Tommy Paul upset No. 22 seed Karen Khachanov in five sets to also reach the semifinals.

It is the first time since 2006 that two American men have reached the semifinals of the US Open.

• Fritz is the first American man to reach the semifinals of the US Open since Andy Roddick in 2006.
• Fritz will face No. 2 seed Rafael Nadal in the semifinals on Friday.
• Tommy Paul also reached the semifinals, making it the first time since 2006 that two American men have made the final four at the US Open.

Fritz's victory over Zverev was a major upset. Zverev is a former world No. 2 and has won 19 ATP Tour titles.

But Fritz played aggressively from the start and never let Zverev get into a rhythm.

Fritz broke Zverev's serve three times in the first set and twice in the third set.

Zverev had a chance to win the second set in a tiebreaker, but Fritz saved two set points and eventually won the tiebreaker 7-3.

In the fourth set, Fritz broke Zverev's serve twice and cruised to a 6-2 victory.

Fritz's victory is a major breakthrough for the 24-year-old American.

He is now one of the top players in the world and a contender to win a Grand Slam title.