The Coach saw red for his protests after a penalty that Samir Handanovic saved from Edinson Cavani, but Udinese still fumbled a 2-0 lead when Diego Fabbrini was sent off.
“I was sent off and it’s never a nice thing, especially on my 100th game as Udinese Coach, but I have nothing to add. It was the right decision,” said Guidolin.
“There is great disappointment within me after this result, as we used to be unstoppable at home and now it’s been ages since our last victory here.”
The Friulani are just one point shy of Lazio in the third Champions League qualifying spot, but still on a par with Napoli.
“Our position in the table is wonderful, but we are all too aware that tonight it could’ve been splendid. We hoped to win, but the draw was the right result.
“My system is basically 3-6-1, as I don’t want reference points up front. I prefer spaces to be attacked from many different angles and midfielders, such as with Giampiero Pinzi’s goal today.
“I am very happy that Pereyra did so well on his first Serie A start, proving once again the club doesn’t get it wrong on the transfer market. This is very satisfying.
“As for Fabbrini, he is only 20 and needs to get some experience. That also comes through the odd mistake.”