Osasuna is tough team and they are showing that they are good challenger top clubs in La Liga. Penalty on Mbappe was major moment and it is fair to wonder if Real Madrid would have scored without it. Osasuna strong defense make match tough and make it hard for Real Madrid to score. Their previous game against Barcelona was showing they are determined team that should not be underestimated. It was close game that showed just they are playing really good.
Ossasuna is not really "that" great, yeah this game looked close but it is not really that close and this was looking close for one reason because Real Madrid missed many chances. If half of the easy chances converted, the game would have been 5-0. Not saying all their shots, literally just half of their chances.
In any case, I think it's close to what we are facing right now and that is why I think Ossasuna could be just a midtable team and nothing more. That isn't bad though, I mean they should be happy because they are spending midtable team money to players and everyone, so they end up where they deserve. Being worse than what you deserve is a worse situation, so being where they deserve is actually good in football world because you get what you expected.