The German women's coach Martina Voss-Tecklenburg says she is expecting a tough battle against Nigeria in the Round of 16 in Grenoble on Saturday.
Die Nationalelf won all their group stage matches, which were against Spain, China and South Africa to finish top of Group B.
On the other hand, the Super Falcons reached the Last 16 round with just one group stage win and two defeats.
Saturday's match will be the fifth between the two nations and the third at the Women's World Cup, with the Germans claiming victories in all of their last four meetings.