He was eventually unable to find the back of the net for a year and a half. In the meantime, Boya failed to convert a penalty in the shootout versus Artmedia Bratislava in the return leg of the 2005–06 UEFA Champions League third qualifying round that would have qualified Partizan for the group stage.
For a period of one and a half years, he was unable to score a goal. Boya missed a penalty kick during the shootout against Artmedia Bratislava in the return leg of the 2005–06 UEFA Champions League third qualifying round, which would have qualified Partizan for the group stage.