STUTTGART, Germany - Canadian teenager Felix Auger-Aliassime will play Italy's Matteo Berrettini in the final of the Stuttgart Open.

The 18-year-old Auger-Aliassime progressed to his third tour-level final without playing on Saturday as compatriot Milos Raonic withdrew ahead of their semifinal due to back problems. The sixth-seeded Raonic lost last year's final to Roger Federer, who opted not to defend his title.

Berrettini defeated Germany's Jan-Lennard Struff 6-4, 7-5 in the other semifinal. The 30th-ranked Berrettini will be going for this third tour title and his first on grass after victories in Budapest in April, and Gstaad, Switzerland, last year.

The 21st-ranked Auger-Aliassime previously reached championship matches in Rio de Janeiro in February and the Lyon Open in May -- both on clay.