Chelsea's defensive issues are so bad that they need to score several goals each game to stand a chance of winning, says captain Cesar Azpilicueta. They have conceded nine times in five Premier League games this season and were 2-0 and 3-2 up against Southampton on Saturday before drawing 3-3. Last month Chelsea came from 3-0 down to draw against West Brom. "When you're weak defensively sometimes we feel like we have to score three or four each game," Azpilicueta said. "I see football as a collective. When we don't score, as a defender I think how can we put our attacking players in better situations. "Through a season you are not going to be winning 3-0 or 4-0 every week. You have to work to get results and at the moment we have to improve that."