Juan Martin Del Potro of Argentina plays a backhand during his mens singles fourth round match against Karen Khachanov of Russia during Day nine of the 2019 French Open at Roland Garros on June 03, 2019 in Paris, France.
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The Argentine No 8 seed lost the first two sets 7-5 6-3 before rallying with a 6-3 win in the third.
Highlights: Khachanov overcomes Del Potro to reach first ever major quarter-final
However, his Russian opponent, who is seeded No 10, clinched the final set with a 6-2 win and will now face Dominic Thiem, who put on a masterclass to see off Gael Monfils earlier in the day.
The 23-year-old, who produced 57 winners throughout the contest, sealed the win with an ace to reach his first Grand Slam quarter-final.
"Yes, I would say it my best match and the best result for me - my first quarter-final of a Grand Slam. So thank you guys for supporting me," he told Eurosport.
"I have really good energy here, there's a really good atmosphere here. People like me, so thank you again. I would say you were supporting Juan Martin a bit more but that's OK.
"Thanks to my team for all their work and for always being by my side. Let's go for more."
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