Vilanova stunned by sending off
The 42-year-old was ordered to leave his technical area by the referee in the 71st minute following his protesting for what he viewed as a foul on Sergio Busquets.
However, he believes the decision was harsh as he believes he didn’t say much except pointing out to the assistant that his player had been robbed of the ball illegally.
"I didn't say anything out of place,” explained Vilanova during a press conference.
“I just said to the linesman that it was a clear foul and he told me not to protest. I told him I wasn't protesting and was just saying it was a foul.
“This dismissal tells us where we're at and gives us an idea of when referees will send off a trainer in the first division.
Regarding the match, Vilanova believes his side did well to get maximum points from what is usually a difficult away game.
"Osasuna had chances and we also created clear opportunities,” he said. “We had been warned, but that is not always enough.
“This is a very difficult ground to come to, but I feel we created enough chances to finish the game off.”
Despite the sending off, Vilanova is expected to be present when Barcelona visit the Santiago Bernabeu for the second leg of their Spanish Super Cup tie against Real Madrid on Wednesday night.