Roberto Martinez revealed that Romelu Lukaku is an injury doubt for Belgium's World Cup blockbuster tie against England after the in-form striker picked up an ankle injury on Saturday.

Lukaku and Eden Hazard both netted twice as the Red Devils routed Tunisia 5-2 in Moscow to leave them top of Group G and on the verge of the last 16. But the Manchester United forward came off in the second half at the Spartak Stadium in Moscow. "We need to look at Lukaku's ankle. He took a knock and has to be assessed," said Martinez, who revealed man-of-the-match Eden Hazard also picked up an injury.