Arteta faces his former club with both sides bidding for European football next season, but the Spaniard believes that the Gunners are unlucky not to have already achieved more points this campaign.
The 31-year-old told Sky Sports News: "We have been unlucky in some games because we haven't deserved to lose the games as we've done.
"When we got knocked out of the FA Cup, out of 100 games, you'd only lose that game the way it happened. But it happened.
"But the only thing we have to fight for now is the Champions League. Now it's in our hands so we can't miss it."
Arsenal will move four points clear of fifth place with victory over the Toffees on Tuesday.