But a 20-year-old Duvnjak gave another glimpse of what was to come in that match against Spain, scoring 7 - Croatia's top scorer.
They just got married.
Tokyo 2020: Duvnjak to dominate? Duvnjak was Croatia's top scorer in both of those games, picking up the player of the match in the final, the tournament MVP and the EHF player of the month for January.
It was like growing up with his own personal technical team around the breakfast table.
Fast forward four years to 2020 and Duvnjak is as committed, loyal and faithful as ever.
The -led French went on to take the gold medal, Croatia lost the bronze medal match to Spain.
Before the start of the tournament, we were not the big favourites and we were not supposed to be in the final, but we made our way, only focussing from match to match," Duvnjak told EHF.
Polish assassin Karol Bielecki had the game of his life scoring 12 goals and there was nothing Duvnjak, Cupic, Stepancic and Strlek could do about it.