Injured England midfielder Kieron Dyer has been given two more days to prove his fitness for the World Cup starting this month. “We will have to wait two more days,” England coach Sven-Goran Eriksson told a news conference on Sunday at his team’s training camp on the South Korean Island of Cheju. Dyer, 23, who missed 10 months last year through injury, hurt his knee after a reckless challenge from Moroccan defender Tahar el-Khalej while playing for his Premier League club Newcastle against Southampton.He joined England’s pre-World Cup camp in Dubai on Friday and flew with the team to Cheju on Saturday.