Walter Samuel and Diego Milito secured the 2-1 result, though El Principe missed an open goal and hit the bar.
“Determination and grit are the qualities I really liked about my team this evening. I am really happy with the performance, as these lads put feeling into it,” said Ranieri.
“Milito is an emblem of the team who wanted to battle, reacted to difficulties and finally managed to score his goal.
“We had done well against Juventus on Saturday and I asked the lads to play in much the same style. They gave me the response I was looking for and sent many positive vibes.
“With consistency you’ll see that the last fears will disappear too.”