Czech qualifier Vit Kopriva shrugged off his lowly world ranking of 249 to stun top-seeded Canadian Denis Shapovalov in three sets at the Gstaad Open on Thursday.
Kopriva, 24 and making his main draw debut this week, fought back to defeat the 10th-ranked Wimbledon semifinalist 2-6, 6-3, 6-2 and make the quarterfinals.
He will faces Mikael Ymer for a place in the semifinals after the Swede saved two match points to move past Spanish veteran Feliciano Lopez 6-7 (6/8), 7-6 (9/7), 6-4.
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