While claiming that Germany are better than Algeria, Lahm wants his side to prove it this evening.
"We're in the knockout phase - either you deliver or you go home," the 30-year-old told FIFA.com. "Germany have been world champions three times and there aren't that many teams who can say that.
"We have had great teams in the past and this squad has great potential, but we have to take it a round at a time and play aggressively. I think we are the better team, but we have to prove that on the pitch."
Germany reached the semi-finals of the 2010 World Cup before losing to eventual champions Spain.