Leeds boss Marcelo Bielsa has confirmed that Raphinha will miss their trip to the Amex on Saturday (3pm).
The Brazilian has missed their last two matches due to a thigh injury.
But Bielsa confirmed he will not be available for their clash with Albion.
When asked how serious Raphinha's injury is, he said: "More than serious is difficult to give a diagnostic of and difficult to give return date.
"It was a hit which created an internal hematoma that hematoma disappears causes pain and inhibits mobility.
"It can be resolved quickly or take longer. Hematoma reduces and the player is no longer in pain he will return quickly.
"My impression is he is in the final stages before finally healed."
He will join Liam Cooper (suspension) and Helder Costa (back) in missing the game.
However, Bielsa did confirm that Rodrigo is back from his injury and is 'healthy' but is not 'guaranteed to play'.
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