Lee Clark criticised Birmingham City's second-half performance after watching his side suffer a 2-0 defeat to Sheffield Wednesday on Tuesday night.
Despite matching their opponents for long periods, Clark's team were unable to take anything away from the game on a frustrating night, and Clark was quick to reveal his anger when speaking to reporters.
"You cannot play so well in the first half and be so different in the second period," the Birmingham boss told members of the media. "This is something we've got to address very quickly.
"We allowed Leeds back into the game in the closing stages and it occurred again against Wednesday.
"We were the dominant team in the first half and then the second half things changed too dramatically for us."
Birmingham return to action against Norwich City on Saturday afternoon.
