Gary O'Neil is desperate for the Hammers to bounce back quickly when they face Reading on the final day of the Barclays Premier League season, so that they secure a top-ten finish.
West Ham are on course to mark their first season back in the big time by ending in the top half, but need a win over the Royals to guarantee their place.
Midfielder O'Neil, who has been a regular in Sam Allardyce's side in recent months, knows a better performance than at Everton will be required to make sure that happens.
He said: "We need to do some work this week and make sure we finish the season on a high against Reading. The aim from the start has been to finish in the top ten and the fact we're safe already had no part to play in our performance on Sunday.
"It was just a poor performance all round. That's gone now, we'll have a look at it, see where we went wrong and make sure we're ready for Reading.
"We've done enough to justify being around the top ten so if we can produce a big performance this Sunday we can get there.
"Everton was disappointing. We got outplayed a little bit. They are a good side and it was a big occasion for them.
"We got overrun and couldn't cope with the way they overloaded the middle of the park - with Osman and Pienaar coming in there, there were five of them at times.
"The early goal made it easier for them, they started to keep the ball well and were in no rush.. We started to get dragged out and it wasn't good enough from us, because we have played well on the road recently."
Having started the last eleven Premier League games in the heart of midfield, O'Neil is hoping to keep hold of his place so that he can end the campaign with a flourish this Sunday.
He added: "I've enjoyed the run of starts, Sunday was the eleventh on the trot - I've enjoyed all of my time here to be fair, the lads are all great and in the the two-and-a-half years, I've enjoyed being around the squad, even when I haven't played.
"The fans have been brilliant, and for the two full seasons I've been here, we've had a promotion and a good season in the Premier League, so it has been successful"