Arsenal have arguably their biggest game of the season on Tuesday night in the UEFA Champions League, as Barcelona are in town. The Spanish giants are looking unstoppable at the moment and with their strikeforce of Lionel Messi, Luis Suarez and Neymar destroying every defence they come up against, the Gunners could have a busy night ahead of them.

After a frustrating 0-0 draw on Saturday at home to Hull in the FA Cup, the attention quickly switches to the mouth-watering clash at the Emirates against the reigning European champions and at the moment, the best team in the world.

Each and every player is going to have to perform if the north London side are going to get a result. here are the five key battles where the game could be won or lost for Arsenal.

Here are the five key battles where the game could be won or lost for Arsenal.

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