The former Manchester City forward believes that, despite losing his place at club level, the 26-year-old will come good ahead of the World Cup finals in Brazil next summerManchester City forward Uwe Rosler has backed England goalkeeper Joe Hart to regain top form ahead of the World Cup finals.
Hart was dropped by City at the beginning of the month following a string of high-profle errors, with Manuel Pellegrini opting to give Costel Pantilimon a run in the first team.
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"Joe has to understand he is accountable and his performance level has to step up, but he will do that – there is no question about it," Rosler told BBC Radio 5 Live.
"Joe Hart is undoubtedly the best goalkeeper in England and he has shown that in the past.
"Manchester City should be very privileged to have England's number one. I can't see anyone really challenging him.
"He has enough time now to get his form sorted before the World Cup and I think it is a great opportunity for him [against Germany] because he will be tested."
Rosler also believes Germany will be under significant pressure in Brazil next summer as they bid to claim a first major title in 18 years.
He added: "Germany normally does very well in big tournaments. They've had a lot of praise for how they have played in the last few years and everyone in Germany is ready for a title.
"I think the pressure is on for the 2014 World Cup, even more than the previous ones because Germany have come very close, but haven't won anything since 1996 [when they claimed the European Championship]."