Five teams, including Lazio, are in the hunt for the final European spot.
"Today we put in a fine performance and wanted to catch sixth place so we could continue challenging for Europe right to the end," Reja told Sky Sport Italia.
"It would be a great achievement for us and we need nine points in the next three rounds. Unfortunately we drew with Torino, but mistakes can happen.
"It's a tough battle for sixth and a lot will depend on what condition we're in going into the head-to-heads."
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