"We need to get on the training ground and address the issues concerning the way we defend," he said after the game at Ewood Park.
"There were some positives and I thought the sending-off had a big bearing on the outcome.
"Tugay was a little unlucky to be booked for an instinctive handball, but I thought on first viewing that the second foul probably deserved the yellow card.
"We have had a lot of players away on international duty and several others just coming back from injury but we need to defend better."