Claude Davis was sent off in the first half as Crystal Palace lost their fifth game in six league matches at Selhurst Park 1-0 to Leicester City.
The centre-half, who had only just returned from a two-game suspension for 10 bookings, was given a straight red after lashing out at Michael Morrison.
The Jamaican looked surprised by the decision, made by assistant referee Rob Whitton, but replays showed he did raise his hands and he will now miss three games.
The Eagles had been poor before that and also lost Nathaniel Clyne to injury at half time.
Leicester dominated as the Eagles sat back and took the lead when Julian Speroni saved Martyn Waghorn's shot only for Bruno Berner to score from the rebound.
To their credit Palace did their best to get an equaliser in the last 15 minutes.
Clint Hill came closest with a header well tipped over by Chris Weale, who also saved well from Neil Danns.
Manager Paul Hart's decision to replace Darren Ambrose with Sean Scannell was met with a chorus of boos with 10 minutes left.
Palace now haven't scored in three matches and will be back in the relegation zone if Scunthorpe United get a point at Newcastle United.
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