The Foxes are still five points clear at the top of the league table following their 3-1 away win at Manchester City on the weekend but have now seen off the challenge of the 2014 champions as they plan to continue taking it match by match.
"After this everything is possible," Ulloa said after the game.
"But we need to fight the same and play with the same mentality, and the same spirit. After that we will wait to see what happens at the end of the season."
"We are so happy because this was a massive game."
"Everyone is happy now. We need to enjoy this but on Sunday we start to think about Arsenal.
"We knew these were two difficult games. We wanted six points and we are now focused on the next game.
"We don't think about the title. We think for the next game, step-by-step, and at the end of the season we will know what happened."