NEW YORK, Feb 14 (AFP): Australian Jordan Thompson upset US top seed John Isner 7-6 (7/2), 6-7 (3/7), 6-3 on Thursday to reach the ATP New York Open quarter-finals.
Thompson, who will face Italy's Andreas Seppi on Friday for a berth in the semi-finals, avenged a loss to Isner in last year's New York quarter-finals.
The world number 63 took his first victory in four meetings with the big-serving American.
"Pretty stoked with that," Thompson said. "It was a tough match. Didn't get much of a look at his serve. I got one break and managed to hold on somehow."
The 25-year-old from Sydney surged ahead 5-0 in the first tie-breaker, then fell behind 4-1 in dropping the second only to take the lone break of the match in the final set.