"Unfortunately we dropped and it was not our intention," Reja told Lazio Style Radio.
"But, nothing is lost, we just didn't take advantage of many opportunities presented to us.
"We look ahead and prepare in the right way for the game with Napoli. For then as for us, it will be a final. Saturday will decide our destiny.
"We didn't need this setback. There had already been a drop in energy, but even doing an analysis of the situations of the other teams like Napoli and Udinese, I notice that after European midweek games they too have had performances that weren't so great.
"We have a significant margin, even if those behind us, like Inter and Roma, have approached."