The 2-1 win at the Olimpico cut the gap to just one point at the top of the table with Daniele De Rossi and Toni on target.
"Tonight is truly a great night," grinned the striker on loan from Bayern Munich since January.
"It was important to win after tracking Inter for so long. Now we can live the dream.
"We are only a point off the leaders and will try to do all we can, seeing as we are right up there with them."