It'll be the No. 1 seed vs. the defending champion in an all-American final in Houston.

Tiafoe reached the quarterfinals for the third year in a row with a 6-2, 6-7(4), 7-5 win, while Jordan Thompson won the longest match in event history.

The top-seeded American advanced to his first clay court quarterfinal on the ATP Tour with a 3-6, 6-4, 6-3 win over Bergs on Wednesday night in Houston.

The 7-6(3), 6-7(2), 6-4 match lasted 3 hours, 16 minutes, the longest first round in tournament history.

The Aussie won his first clay-court match at an ATP Tour event by beating No.5 seed Christopher Eubanks 7-6 (4), 7-6 (2) in the Houston first round.

If the clay-court tournament is to finish Sunday, it will require cooperative weather and the eventual finalists completing back-to-back days of double duty.

The U.S. Men's Clay Court Championship was among the dozens of professional tennis events scrapped in 2020 while the tours were on hiatus for several months.

The U.S. Men's Clay Court Championship began in 1910, and has been held in 21 different U.S. cities. In 2000, it came to Houston, at the Westside Tennis Club. Since 2008, it has remained in the same city, but has been played at River Oaks Country Club.

Nearly six years after winning the French Open Juniors title, the 22-year-old Garin finally broke through on the tour, spoiling Ruud's bid to become the first Norwegian winner.

Casper Ruud will attempt to become the first Norwegian champion in ATP history; his father and coach, Christian, won an exhibition tournament at Houston's River Oaks.

The 22-year-old qualifier completed a three-set win on Saturday (over Jordan Thompson), but fell in the semifinals later in the day (against Casper Ruud).