I had no intention to publish more about the errors commited by Nicola Rizzoli, the referee of the match Arsenal-Barcelona, as they were sufficiently clear. But I just came across an article that moved me to do so: "Barcelona Press Blames Referee For Arsenal Defeat".
The most outrageous sentence is: "Barcelona’s holier than thou motto ‘mes que un club’ (more than a club) holds no grounds if that is how they react to a loss." Shameful sentence if we consider that, first the players and coaching staff behaved with even excessive restraint for what happened in the field. What a difference between the reaction of the Barca players and Drogba in Chelsea's defeat against Barcelona. And second, the British press did not say the same after that match between Chelsea and Barcelona, where, despite they what they say now, they raised Cain.
Also it is the Barcelona press blaming the referee but the evidences:
The most outrageous sentence is: "Barcelona’s holier than thou motto ‘mes que un club’ (more than a club) holds no grounds if that is how they react to a loss." Shameful sentence if we consider that, first the players and coaching staff behaved with even excessive restraint for what happened in the field. What a difference between the reaction of the Barca players and Drogba in Chelsea's defeat against Barcelona. And second, the British press did not say the same after that match between Chelsea and Barcelona, where, despite they what they say now, they raised Cain.
Also it is the Barcelona press blaming the referee but the evidences:
Goal by Messi wrongly annulled for nonexistent offside:

Hands in the area by Djourou:

Penalty on Pedro:

Hands in the area by Arshavin:

Hands in the area by Djourou:

Penalty on Pedro:

Hands in the area by Arshavin:
In addition to any other designated non-existent offside against Barcelona and the second red card forgiven a Song.
Too many errors and too decisive as to deny that the referee allowed the Arsenal not only win, but not thrashed out.
PS: And to explain why, according to him, said Barcelona beat Arsenal:
"What did Arsenal win more special was that, indeed, beat Barcelona at their own game.
Barca, of course, had a 61% possession, according to UEFA.com, but nevertheless, they overtook Arsenal at times, and the two goals were the result of excellent passing moves . "
Surely this guy saw a different party than the rest of humanity.