Croatian midfielder Petar Pfeifer, aged 19, is moving to Grobničan on a dual registration from Rijeka. He is one of several young players making the same move, alongside 17-year-old midfielder Lukas Murica, 17-year-old left-back Marino Miškulin, and 18-year-old forward Leonardo Draguzet. Pfeifer has been capped twice for the Croatia U18 national team.