Barça came back from a goal down to lead 2-1 thanks to goals from Ansu Fati and Arthur Melo but Roberto Torres' late penalty, his second goal of the game, earned the hosts a point.
"We leave feeling angry and p****d off," he told Movistar. "We've done the difficult part, which was coming back from Osasuna's first goal, and in the end they equalise with a penalty. We've dropped two points.
"Osasuna pressed a lot in the first half and we struggled to get control of the ball, with their fans pushing them on a lot. They scored the chance which came their way. Now we have to think about our next games."