Current world champions Germany lost 1-0 to Mexico in the teams' first World Cup match at the Luzhniki Stadium in Moscow on Sunday.

"We mustn't allow another match like this, no matter how long the tournament, no matter when, or else we'll go home. With that in mind, we've understood once and for all that only absolutely top performances will do," said Hummels.

Germany will play Sweden in their second Group F game in Sochi on Saturday, before taking on South Korea in Kazan four days later.