Theo Walcott rates Barcelona's visit to Arsenal as the biggest game of the season.
The England winger was part of the Gunners side who were dumped out of the Champions League by the Spanish giants last season and is desperate to return the favour.
Walcott thinks Arsene Wenger's side are a much improved prospect, saying: "We're looking forward to it, it's going to be a great, great battle."
He added: "It's one of the games you want to play in and hopefully the result can be different from last year.
"I believe we can do much better than last season; we can't do worse to be honest.
"It's going to be an open game but these days when we lose the ball we try to get it back quicker.
"That's what we did against Chelsea and Manchester City and hopefully we can take that into the Barcelona game because it's a massive one this season, the biggest one I'm going to play in."
Walcott made a big impact when the sides met in the quarter-final first leg at the Emirates last year, scoring within two minutes of coming on as a second-half substitute.
Having gone 2-0 behind and been outclassed in the first half, Walcott's goal revitalised Arsenal, who went on to draw the game through a Cesc Fabregas penalty.
A 4-1 defeat at the Nou Camp ended their hopes of progressing.
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