The Ivory Coast international has 13 league goals this season, the most for any Palace player.
Vieira said post-game about Zaha cupping his ears when the crowd was goading him: "This is part of Wilfried and his character, his personality.
"This is a strength [and] weakness at the same time. At times there were some fouls, and he is a target player, of course, but he has to manage the situation.
"He has to manage his mind, he has to keep that energy, that strength to allow him to make those kind of differences in the last third.
"This is something he will have to manage better. Saying that, he is a target and it has been a bit difficult for him at times."
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