Speaking on talkSPORT, Littlejohn said: "Barcelona, they've been here before. It's just another final to them right now and I just feel like they're going to want to wipe the floor with Arsenal and just show 'We are the champions of Europe still and you have all got so much work to do to catch us.'
"Arsenal have nothing to lose. We're the underdogs. We've spoken about it before. Is it the year of the underdogs? So, they're going to go in, but at the same time, they're going to need to deal with the occasion, the nerves, and then just getting up to speed and play against the likes of Barcelona.
"I think maybe because they are the underdog, because they are under pressure, because it is bloody Barcelona that maybe Arsenal might throw up a bit of a shock.
"Arsenal are leaking goals. I feel like if the squad were all on the same page going, 'Yeah, Barcelona, we have to bow down and accept that they are absolutely great and they're ahead of us right now because they've been consecutively performing in high level tournaments for years now.' Do we go, 'Okay, we have to respect that and let's kind of just change our change our identity a we bit for this game to try and frustrate them and stay in the game.'"