Danish teen Holger Rune persevered his remarkable run on clay in Munich by beating Oscar Otte in straight units on Saturday to reach his first very last at the ATP Tour.

Rune, who turned 19 on Friday, had bowled over pinnacle seed and Olympic champion Alexander Zverev inside the 2d round on Wednesday in the Bavarian capital.

Rune produced another mature display to seal a 6-4, 6-4 win over Otte to set up a title decider with Dutchman Biotic van de Zandschulp, also through to his maiden ATP final.

Van de Zandschulp, 26, wanted nearly three hours to muscle past Serbia’s Miomir Kecmanovic.

He held his nerve to assert a 2-6, 7-6 (7/4), 6-4 victory and construct on Friday’s zone-final disappointed of 2nd seed Casper Ruud.