Giroud is in contention to face Manchester United today.
"We need consistency, but we also need to know how to close out the game after winning it, like against Anderlecht and Swansea away," said Giroud.
"I could not believe what I was watching (against Anderlecht), that is one of our weaknesses, we don't know how to close the game when we are winning.
"We must just stay at the back and not take too much risk, I don't know where it comes from, but we need to improve ourselves in this way.
"Tactically, we all defend together, we are all attacking together, so it is all about the balance of our team, you cannot just target the defenders.
"Maybe we need more support for the defence when you are winning the game, just stay and don't go (forward) any more."
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