Belgium coach Roberto Martinez said he is concerned aggressive targeting of Eden Hazard by opposition defenders could lead to his side losing their captain and star player at the World Cup. Belgium ran out 3-0 winners over tournament new boys Panama in the Russian Black Sea resort of Sochi on Monday.

The game was also marked by some tough challenges, with five Panama players booked by the Zambian referee Janny Sikazwe. "It is a worry that in any of those tackles he could really get hurt," said Martinez.