The defender said: "There were two things on Saturday - firstly Birmingham came here and played very well and secondly we didn't do enough to win the game.
"It is frustrating because the last couple of games haven't gone as well as we'd have liked.
"Birmingham made it difficult and you have to give them credit for that because we weren't able to create too much against them.
"We've got such a good record at Anfield over the last few years and so it's always going to be disappointing when we don't win here.
"But we're going to play 50 or 60 games this season and we're not always going to perform as well as we'd like.
"I'm sure our form will turn around. The players are good enough so there's no need to worry about us. There are still a lot of games to play before the end of the season."