West Bromwich Albion boss Tony Pulis says it is "disgraceful" that the club cannot appeal against Claudio Yacob's two yellow-card dismissal.
Yacob must serve his ban for being sent off following his tackle on Aston Villa's Leandro Bacuna, as it was not a straight red card.
"It is disgraceful," Pulis told BBC WM 95.6. "I find it absolutely astounding.
"But I don't make the rules. You can be sent off for a red, appeal and get off, but two yellows and you can't appeal."
|What next for the Baggies?|
|After successive defeats for the first time since he became Baggies boss, Tony Pulis now faces a meeting with his former club Stoke City at The Hawthorns on Saturday. Mark Hughes' Potters are on a roll, having won three Premier League games on the spin to rise to eighth in the table, five places and 12 points above Albion|
Pulis was critical of referee Anthony Taylor after Albion's defeat by Villa in Saturday's FA Cup quarter-final.
"I am really disappointed because if you watch the incident, it's a blocked challenge," said Pulis. "Taylor doesn't make the decision until Claudio has two touches, so he's made a decision late.
"Whether the referee has got it in the back of his mind that he should be sent off for jumping into a two-footed challenge, I don't know.
"If he has and it's preconceived, then it's wrong. I'm not here to criticise referees but we have lost a player who should never have been sent off."
Albion's 2-0 defeat was their second reverse at Villa Park in five days, having gone down 2-1 in last Tuesday night's Premier League encounter.