Despite lying 18th in the table, Osasuna poses a serious threat to snatch points from Barcelona.
Barca is coming off its first La Liga loss of the season, giving up three goals to Real Sociedad after going up 2-0. The club has now taken a whopping 55 out of 60 points so far in the 2012-13 season.
Osasuna is riding a wave of good momentum right now. It drew with Real Madrid a few weeks ago, and then picked up only its fourth win of the season after beating Deportivo, 2-1.
Now there's certainly almost no argument that could be made that Osasuna has any chance whatsoever of actually picking up three points. The club has only scored 16 goals in 20 matches, last in La Liga, so it's unrealistic to think it could go into the Nou Camp and outscore Barcelona.
However, Osasuna has only conceded 21 goals, which is fourth in the league.
Madrid was short-handed in the draw, as it didn't have Cristiano Ronaldo or Sergio Ramos, and Kaka was also sent off 76 minutes into the match. Regardless, Jose Mourinho found out the hard way exactly how organized Osasuna can be at the back.
Barcelona could be coming off a bit of a letdown as well. There was plenty of incentive and motivation in trying to make it though the entire league slate unbeaten. Now that that's gone, all that's left is to try and top Madrid's 100 points in a season.
As Barca have built what looks to be an unassailable lead already, it's only natural that the players' may lose focus for a little bit thinking the league title is already won.
It's the matches like the one coming up against Osasuna that could be the most troubling.
There's no worry about the players' frame of mind when they face off with the likes of Real Madrid, Atletico Madrid, Malaga, Valencia, etc. Those are some of the biggest clubs in Spain and among the biggest threats to Barcelona in the league table.
The lower-level sides, though, might be looked past as the match is thought to already be in the bag.
Barcelona might be looking to their date with Valencia on February 3 in the Mestalla. Los Che have been playing much better football as of late.
It is possible Osasuna is nothing more than an afterthought, and it wouldn't stun me to see it go out and holds Barca to a scoreless draw.
Of course, all of what was written above will sound incredibly foolish in the event Barcelona win, 5-0, and Messi goes for a hat-trick. That's a realistic possibility with every Barca match at this point.