Former Arsenal captain Thierry Henry has praised the Gunners after they fought back to claim a 2-2 draw with Barcelona at Emirates Stadium on Wednesday night.
Barca threatened to run riot in the first leg of the Champions League quarter-final but showed real character to come back from two goals down and head to the Nou Camp on Tuesday on level terms.
"I was not surprised by what the Arsenal team did, not with these fans,'' said Henry on Arsenal's official website. "I have said it so many times that it always helps. They can be 2-0 down at home and if your fans start to boo you then it's a different story - but the Arsenal fans were helping them, trying to make them come back in the game.
"However, I am not surprised at all because I know what can happen here. It did not look like they could come back, but at the end of the day they did it. That shows a team which is in the quarter-finals are difficult to beat. We need to be aware of a team like that.
"We do not concede a lot of goals, but they scored two against us, so that is a sign.''
Of his return to the north London club where he became the club's all-time record goalscorer, he said: "There was a lot of emotion and there was a special moment at the end. Like we always do as a team at Barcelona, we went to say thank you to our fans.
"What happened after that, I never imagined. I would like to thank the Arsenal fans for the welcome back. I have great love for the club and I think the fans still love me. It was amazing.
"Now I play for another team and will compete for another team, but it reminded me of the bond, the love I have with the club and the fans. The reception when I came on and then at the end made it difficult for me to leave the pitch.
"I did not want to leave the pitch and the fans did not stop clapping, it was amazing and no words can describe the feelings I had. I just love the club, everything I did was tremendous and that is all still there.''
Henry believes Arsenal could yet still have a say in the title race, with top two Manchester United and Chelsea to play each other this weekend.
"The Premier League race is tight, but even after the defeats to Manchester United and Chelsea I was saying they can win it - and I still think they can,'' the Barcelona forward insisted.
"As I always said in my time here, as long as it is mathematically possible, then you have a chance.''