First 20 minutes...

I notice a kind of trend in Barca's game. In a lot of games, especially with better opposition Barca seams out of tune a bit in the initial 10-30 minutes. Most of the times this does no pose a problem, but sometimes the opposition scores and makes our players life a hell with park the buss strategy. Even if we win at the end we have to work double for it.

I know a lot of times it happens because teams press harder in those initial minutes and then get tired and we get the game on our way. But other times it just happens with no apparent reason (at least to me). Maybe the team needs a bit of time to find the rythme. What do you guys think? Is it something that should make us worry?