Mikel Arteta remains optimisitc of Arsenal's chances of Champions LEague qualification.
The Gunners crashed out of the Europa League at home to Olympiacos after taking a 1-0 lead on aggregate into the second-leg.
But the Spaniard reckons if results go their way, they will have a chance of returning to Champions League action.
Arteta said: "If we beat West Ham, it will look more likely. So that's the only aim.
"If, game by game, we go and start grabbing three points and three points and three points, and then we'll have a chance in the last three or four games of the season."
David Moyes, meanwhile, has set his side a challenge for his side as they look to avoid relegation.
"I felt the big games, I used the word the big games, started after Liverpool. I thought our performances against Liverpool and our performance against Southampton gave us optimism about how we can play and what we can do.
"I felt we've got to keep those levels of standards up. We've scored some goals, conceded some goals but I think we've got to make sure we have to be hard to beat, because you're not always going to score every week."
Lowdown
Arsenal have won eight of their last nine Premier League games against West Ham United, losing the other on the opening day of the 2015/16 season.
West Ham have won just two of their last 23 Premier League games against Arsenal - drawn four and lost 17 too - since a three-game winning run against the Gunners between February 2006 and April 2007.
When and where?
The game will take place at Emirates Stadium on Saturday (March 7).
Kick-off time?
The game will kick-off at 3pm.
Is it on TV?
No - fans in the UK will not be able to watch the game on the TV.
What's your prediction?
Sam Quek and Jermaine Jenas have had their say on the match for this week's footie5 competition.
Sam's gone for a 2-1 win for Arsenal. She said: "Having crashed out of the Europa League, Arsenal need a win as much as West Ham. Could be a decent game this, home win for me though."
However, Jermaine has gone for a 2-2 score draw. He said: "West Ham are starting to show some form and their front three can cause problems, but Arsenal have to bounce back after their European exit."
Enter your predictions for free on footie5 for the chance to win £25,000 here.
What are the odds?
Here are the latest odds with thepools.com:
Odds subject to change - Bet responsibly - begambleaware.org - 18+
Team news
Lucas Torreira (knee) looks set for a spell on the sidelines f
Kieran Tierney (shoulder) set to return but Sead Kolasinac (shoulder), Cedric Soares and Calum Chambers (both knee) are out.
Tomas Soucek (hip) is fit for West Ham.
Andriy Yarmolenko returns to training, while Ryan Fredericks and Jack Wilshere are still out.
