I have done a statistical study of the wins and losses of these two teams and it is clear that Atletico Madrid are more likely to win against Osasuna. There is also a possibility of a draw in the match, so if someone bets in favor of Atletico, then their chances of winning should be higher. Many people will bet on the less powerful team because sometimes good times and luck can be favorable for those teams. The trophy in La Liga is definitely decided by Barcelona and people may be relatively less interested in winning or losing the match. I think Osasuna will have a good and impressive match today and Atletico Madrid will not want to lose to a team that is relatively weaker than them.
Atletico may be more favored, but the difference will not be too far. There is even a possibility that Osasuna will give a surprise in the match later. The last meeting between the two was a narrow 1-0 Atletico victory at their home. Osasuna also beat Atletico 1-4. So the match later may be quite tight. Maybe Osasuna also has a chance to win the match. We never know that something surprising sometimes happens on the field.