Two goals from Cameron Jerome in the early stages of both halves at St Andrew's left Rovers facing an eighth defeat of the Premier League season.
- Birmingham 2-1 Blackburn
- As it happened
"You can't give away two silly goals like we did, especially the first one," said Allardyce.
"We expected Birmingham to come out all guns blazing and put us under the cosh but we controlled the first 10 minutes and looked nice and comfortable and were probing away.
"We gave them the first corner and then we decide to give them a goal and, in the mood they are in, and with the confidence they have got, it is always going to be difficult to come back from that.
"We've killed ourselves in the space of a few seconds and the rest of it in between, in terms of who is the better side, is down to the toss of a coin."
Source: DSG
