Bundesliga giants Borussia Dortmund have confirmed the signing of 17 year-old striker Alexander Isak.

The Swedish teenager joins from Allsvenskan side AIK Solna and signs a long-term deal with BVB with the fee reported to be around €10 million euros.

Isak became Sweden’s youngest ever goalscorer on his full debut finding the net against Slovakia in January aged just 17 years and 113 days.

He made his Allsvenskan debut in February 2016 and scored 13 goals in 29 appearances.

Isak Joins Dortmund At 17 Years Old