AZ Alkmaar boss Ronald Koeman rates Arsenal as a Champions League contender this season.

Arsenal thumped the Dutch 4-1 at Emirates stadium last night.

"They have a lot of qualities but it's very young and maybe they miss a little bit of experience that other teams like Chelsea and Barca have," Koeman said.

"One bad day and you can lose against everybody. It's not one team better than the rest - it's very close. But Arsenal can go a long way in this competition."