Wales have been dealt a blow on the eve of their first World Cup since 1958 after Joe Allen was dominated out of their opening recreation in opposition to the USA with a hamstring harm.Allen was a serious doubt having not performed since September and Wales supervisor Rob Web page has confirmed the midfielder has misplaced his battle to be match to face the US.His failure to get better from his hamstring harm in time leaves Web page with a variety headache.Allen, the 32-year-old former Liverpool midfielder who now performs for Swansea, is a key participant for Wales.READ MORE“We stated from the beginning we have been going to present him each attainable likelihood however he’s not going to make it if I’m being utterly sincere,” stated Web page.“If he breaks down, he’s positively out for the event. We’re not going to push him.”After taking part in the USA on Monday, Wales face Iran 4 days later after which meet England of their remaining Group B recreation on November 29.Wales will hope Allen can be match to characteristic in opposition to Iran.