Boss Mark Hughes believes Stoke will appeal Geoff Cameron's red card as he prepares for their cup clash with Liverpool.
The midfielder was sent off in Saturday's 2-1 defeat at West Brom for pushing Claudio Yacob in the back of the neck.
Stoke host Liverpool in the League Cup semi final first leg on Tuesday with Cameron looking at a three-match ban if the Potters fail to get his dismissal overturned.
Hughes said: "We'll have a look at that and decide whether or not to appeal but I think it's likely.
"It was unfortunate. I thought Geoff has reacted to a late challenge on a leg he injured in the first half. It is understandable to a certain extent.
"We weren't too happy with the reaction of the lad Yacob to be perfectly honest. I thought he has gone down with the intention of maybe getting Geoff sent off and unfortunately for us that's what he's able to do."
Jonny Evans capitalised on Cameron's card when he scored in stoppage time to give boss Tony Pulis a third straight win over his former club.
Jonathan Walters had equalised just two minutes before Cameron's 83rd-minute dismissal to cancel out Stephane Sessegnon's opening strike.
It was his first goal since October 2014 while Evans opened his Albion account - which sent the Baggies nine points clear of the Barclays Premier League bottom three - and earned praise from Pulis.
He said: "He's been a great signing for us. His quality in possession is first class. He slows things down for us and is more than just a good defender.
"We've played him at centre-half, left-back, in the centre of midfield - he's done a good job in all of those.
"He just oozes class. He's a top, top player."