Stoke City defender Ryan Shawcross has described his side's performance last night as "very disappointing".
The Potters conceded a pair of late goals to Birmingham City that forced extra time before coming past the Championship outfit on penalties.
"It was a very disappointing performance from everyone and we need to have a good look at ourselves before Saturday to make sure we're better because that's not good enough," Shawcross told the club website.
Stoke host in-form Southampton, who are fifth in the table, in the league on Saturday.
