Germany captain, Philip Lahm feels his side must drastically improve their defence or risk an early 2014 World Cup exit.
"we have to work especially on our defence," the Bayern Munich star told Bild with Germany facing Portugal in their opening Group G game on June 16 in Salvador.
"Recently, we have conceded too many goals and allowed our opponents too many chances. We must pay attention to our defensive formation and the whole team is needed for that."
Traditionally, Germany have relied on rock-solid defence at major tournaments, but they have leaked goals in recent times, namely a 3-3 friendly with Paraguay last year and a 4-4 World Cup qualifier against Sweden.
Germany started their 10-day pre-World Cup training camp in the north Italian Alps yesterday and face two final warm-up matches against Cameroun on June 1 in Moncengladbach and Armenia on June 6 in Mainz.
