Germany forward Thomas Mueller expects revenge to be a factor when his side take on Brazil for the first time since humiliating the South Americans 7-1 in the 2014 World Cup semi-finals. Joachim Loew’s Germany start fine-tuning preparations for their World Cup defence in Russia with high-profile friendlies against Spain in Duesseldorf on Friday and Brazil in Berlin next Tuesday. Spain, the 2010 World Cup winners, have the first chance to break Germany’s 21-match unbeaten run, dating back to their Euro 2016 semi-final defeat by France. However, the clash four days later at Berlin’s Olympic Stadium offers Brazil a rare chance to beat Germany in their own backyard and avenge the hammering in Belo Horizonte almost four years ago.