1 seed Holger Rune of Denmark got past Argentina's Tomas Martin Etcheverry 6-1, 3-6, 7-6 (6) Friday to reach the semifinals of the Swiss Indoors Basel.
But on the 13th point, Rune hit a dead netcord for a flukey, if fortunate, point.
Hurkacz rallied past Dutch opponent Tallon Griekspoor 6-7 (6), 6-4, 6-4, while Humbert beat Swiss wild card Dominic Stricker 6-4, 2-6, 6-2.
1 seed Daniil Medvedev of Russia needing three sets to beat countryman and eighth seed Karen Khachanov 6-3, 3-6, 6-3 in the quarters.
2 seed Jannik Sinner of Italy won 32 of 38 first-service points (84.2 percent) to beat seventh-seeded American Frances Tiafoe 6-3, 6-4.
Persons:
Holger Rune, Denmark, Argentina's Tomas Martin Etcheverry, Rune, Felix Auger, Alexander Shevchenko, Hubert Hurkacz, Ugo Humbert of France, Hurkacz, Tallon Griekspoor, Humbert, Dominic Stricker, Daniil Medvedev, Karen Khachanov, Medvedev, Stefanos Tsitsipas, Croatia's, Italy, Frances Tiafoe, Andrey Rublev, Alexander Zverev
Organizations:
Swiss Indoors Basel, Russian, Swiss, Erste Bank, Thomson
Locations:
Canadian, Poland, Vienna