At just 20 years old, Dominik Marczuk is helping Jagiellonia Bialystok push for their first ever Ekstraklasa title… but what makes the Polish star so exciting?   Dominik Marczuk signed for Polish club Jagiellonia Bialystok on a free transfer this summer following the expiry of his contract at Fortuna 1 Liga club Stal Rzeszow. During…