Thomas Müller and Antonio Rüdiger missed Germany’s first training session ahead of the World Cup in Qatar and will therefore sit out Wednesday’s friendly against Oman, coach Hansi Flick said. Müller has muscle problems and Rüdiger a slight hip injury. Flick’s side fly from Oman to Qatar on Thursday, with their first World Cup game against Japan on November 23 in Group E. “We are monitoring them from day to day. We assume that they will train with the team on matchday minus four,” Flick told a news conference on Tuesday, referring to Saturday as the first day the duo might train. Eintracht Fran…