An emotional top-seeded Holger Rune of Denmark was forced to retire from his semifinal match of the Nordic Open in Stockholm due to a leg injury when he was up a set on French No. 4 seed Ugo Humbert on Saturday.

After winning the first set 6-4 and level at 2 in the second set, Rune pulled up after experiencing a sharp pain in his lower leg. After receiving treatment, he was unable to continue. Humbert, who had 12 winners to seven unforced errors, is through to his 10th ATP final.

He'll face Norway's No. 2 seed Casper Ruud, who advanced past third-seeded Canadian Denis Shapovalov 6-3, 6-4. Ruud won a dominant 83% of his first-service points, avenging a loss to Shapovalov in the finals of the Dallas Open in February.

Almaty Open

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