Germany captain Michael Ballack has been ruled out of this summer's World Cup because of the right ankle injury he suffered in Saturday's FA Cup final.The 33-year-old Chelsea midfielder has made 98 appearances for his country and played in the last two World Cups.A scan revealed a partially torn ligament but it is expected to be eight weeks before he can resume training and Germany's first match is on 13 June.He was injured after a challenge by Portsmouth's Kevin-Prince Boateng in the final of the FA Cup against Chelsea.Ironically, Boateng could be part of the Ghana squad that will face Germany in Group D at the finals in South Africa.Source: BBC