American qualifier Christian Harrison, ranked 789th in world tennis, stunned top seed Cristian Garin of Chile 7-6(3) 6-2 on Saturday at the Delray Beach Open in Florida to book a maiden quarter-final spot in his injury-plagued career.
The 26-year-old reached a ranking of 162 in 2013 but has seen his career flag due to eight surgeries.
His win against world number 22 Garin made him the second-lowest ranked quarter-finalist in the tournament's history, after 2009 U.S. Open champion Juan Martin del Potro, who reached the same stage as 1,042nd in 2016.
"I just love the sport, I love what I'm doing," Harrison told reporters. "I just can't wait to keep playing and hopefully have a good, healthy next couple of years."
It was Harrison's first victory against a top 50 player and he would next meet Italian Gianluca Mager, who beat sixth-seeded Sam Querrey 7-6(8) 6-1.
"He played well. He played very good, of course. He's won four matches this week" including qualifying, Garin said of his opponent.
"These conditions are good for him. He played really flat, really fast. The ball helps his game a lot, and I hope he can play like this the rest of the year."
(Reporting by Sudipto Ganguly in Mumbai; Editing by William Mallard)
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