Diego Costa issued an apology to his Wolves teammates after his red card in the 1-1 draw with Brentford on Saturday.
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Ben Mee put Brentford in front in the second half but Ruben Neves pulled Wolves level just two minutes later.
Costa, meanwhile, is yet to score in six matches since making his Premier League return and the former Chelsea striker now faces an extended spell on the sidelines.
In the closing stages of the draw with Brentford, Costa was sent off for violent conduct after he headbutted Mee off the ball.