Downing featured for the Hammers in Saturday's stalemate at St James' Park.
Downing said: "Newcastle enquired about me, but it sounds like their owners are similar to Liverpool on transfer fees and wages, the player's age. That all comes into it and I think that was obviously a problem for Alan Pardew.
"It was one I was interested in and I looked at, but when I spoke to Sam he wanted me straight away and pushed the boat out to get me and there's nothing more you want as a player."
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