"It was a vibrant game and in my view whoever took advantage of their positive moment would come out on top," said Coach Guidolin.
"These are two teams who go in fits and starts, so they can be extremely dangerous at any moment. Up until Di Natale's goal, Inter had more chances, but they didn't take them.
"In football these incidents are decisive and Di Natale was fantastic when scoring the opener. It is very satisfying to win this match, as the team worked well. Now we get closer to our objective.
"Was the red card decisive? We were already in the lead by that point and had turned the balance of the tie in our favour. I think the real key to the win was Di Natale's first goal."