FRANKFURT, March 19 : Bayern Munich keeper Jonas Urbig and teenager Lennart Karl earned their first Germany call-ups on Thursday for friendlies against Switzerland and Ghana with coach Julian Nagelsmann's 26-man squad expected to form the basis of his World Cup selection. The 18-year-old Karl has been sensational for Bundesliga leaders Bayern this season while teammate Urbig has stepped in as Bayern's starting goalkeeper following veteran Manuel Neuer's injury. With Oliver Baumann seen as