The 36-year-old coach said that his team met a very strong and well organised side and refused to write off the Nerazzurri's chances of finishing in the top three
The Nerazzurri were unable to close in on the Champions League qualification zone following their seventh Serie A draw of the season, which was secured by Julio Cesar as the goalkeeper saved Adem Ljajic's penalty.
"You have to give credit to Fiorentina," Stramaccioni told Sky Sport Italia. "They put in a good performance when they were not in possession.
"It was not easy to play against Fiorentina. AC Milan and Palermo struggled against them.
"I selected strong players in one-on-one situations and I think that Mauro Zarate, Ricky Alvarez and also Maicon did well when Fiorentina opened some spaces.
"Forlan? Looking back, I would have picked him anyway, considering all that he did in training during the week. He could have done better, just like everyone else."
Lazio could enlarge the gap between themselves and Inter to eight points in Sunday's match against Lecce, but Stramaccioni believes that his side can still finish in the top three.
"We will keep fighting, until it is mathematically impossible," he said. "We are Inter and we will always fight for the highest possible goal."
The Milan side are currently in seventh, five points adrift of Champions League qualification.