So he's going to miss a few key games like the Champions League match against Inter and the Clasico against Real Madrid next weekend.
Fun fact: it'll be the first time in 11 years that we won't see Messi and Ronaldo playing
El Clasico.
As a RM fan, I'm upset that Barcelona won't have Messi as I would've liked to see the best players on the pitch. On the other hand, we might have a shot against Barcelona, no Messi is a massive handicap, but still, given how shit we are right now (we've won 1 out the last 5 games in the league), I believe the chances of winning are very low. I'll take at least a draw.
With the way Real Madrid have been playing so poorly, it wouldnt be surprising if Barcelona are able to beat them in the El Classico without Messi in the team and they should be even grateful that he is out injured.