West Ham boss David Moyes admits they're finding the winter market difficult to work.
Moyes was speaking after Sunday's defeat to Leeds.
He said: "The club and the board are happy that I can bring people in, but it is up to me to find the right players.
"You want to pick up good players where your own players think you are adding something to the squad.
"One does not want to pick up players who are not going to make a big difference. I try to be a little picky."
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