The Hammers host Chelsea later today.
Moyes said, "I think when you're a centre-forward we can think of many who go through a barren spell and don't quite get the goals and it's not going in for them. I mean, Mic been a little bit unlucky, he had a really good header the other night that the keeper made a save from.
"Mic is really important for us, he is a focal point for our team. We've needed him over the last couple of years playing as a centre-forward. We've missed him when we have not had him so I'm hoping we can get him back into scoring ways and into top form.
"Sometimes I think all strikers would say they just need to keep getting chances and sometimes you will miss some. The worst thing is when you are not getting any chances or having any chances, so let's hope Mic continues to get chances."
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