Stoke manager Mark Robins lamented his side's lack of a finishing touch in their 2-0 defeat by Swansea.
Eric Bocat and Ashley Phillips were both denied, with Ben Wilmot seeing a goal chalked off for an offside, before the 10-man Potters conceded twice to return to Staffordshire empty-handed.
Robins told BBC Radio Stoke: "We had two unbelievably good chances to get our noses in front. We've got to take those chances and then we had a goal disallowed.
"Then it's compounded by Sorba having a yellow card that didn't look like one – how can you be penalised for trying to take a shot mid-air and somebody putting their head down?
"That put him on a tightrope and then, for all the good he has done, that loss of discipline can't happen if that was a kick out. He has given the game away.
"The goal that we conceded was really poor but we still carried a threat right up until the end. We need to lick our wounds ready for the game [against Ipswich] on Tuesday."
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