Mikel Arteta insists Arsenal can finish inside the top four.
Arteta believes Arsenal have the necessary character to go on and claim a top-four finish.
"It is about confidence and this win builds a bit of enthusiasm," the Spaniard said. "It gives us something to look forward to at the end of the season.
"But on Tuesday there is another massive game coming up. We will have to see what we have available because we lost a few players as well.
"Let's see what we have got, prepare for the game the best way we can because West Ham will be tough opponents again."
Arteta added: "It (fourth) is still there for us. That would be a big step forward up from last season because we haven't achieved to do it.
"There's still a long way to go, there are four weeks until the end of the season. I believe we can do it, but we need to win all our remaining games because if we don't then I don't think we will do it."
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