 After playing for AEK Athens Academies he moved to Olympiacos Academies where Kampetsis’ career really took off and went to the next level.His dominance, goal scoring record and all-round game at youth level could not be ignored, and as a result, he became a regular fixture in the youth teams of the Greek national football team setup.He attracted interest from top clubs from England, Germany and Italy but it was German giants Borussia Dortmund who made him the best offer.