Oliver Kahn has warned Brazil that they will be facing the world's finest goalkeeper in Manuel Neuer ahead of Tuesday's clash with Germany.

The Bayern Munich shot-stopper has earned rave reviews for his World Cup performances thus far, helping Joachim Low's side into the semi-finals, where the host nation await.

Neuer's most significant display arguably came in the second-round win over Algeria, where his 'sweeper-keeper' antics thwarted the Africans on a number of occasions.

"He has proven at this World Cup that he is currently the world's best goalkeeper," the legendary German keeper is quoted as saying by Goal.com.

"Everyone knows that he is a wonderful footballer who can really play well. But what is crucial is that in important situations, he can rescue the victory. That is ultimately what he will be measured by."

Tuesday's last-four encounter is scheduled to kick off at 9pm.