Roberto Martinez: The tackling worries me, I don't want to lose Hazard FIFA World Cup Russia 2018 - Belgium Concerned despite Belgium's opening win

Belgium eased to an opening fixture win over Panama to top Group G, running out 3-0 victors against the World Cup debutants, but coach Roberto Martinez wasn't all smiles.

Speaking after the final whistle, he expressed his concern at one aspect of the tie in particular.

"Every team can prepare how they like, but the tackling concerns me," he told reporters of Panama's rugged style.

"I wouldn't like to lose [Eden] Hazard to a hard tackle on his ankle, I say it for him and all the great players here."

It took the Belgian side until the second half to break down Panama, with Dries Mertens breaking the deadlock early in the second half.

"We were mature, responsible and serious, the commitment of this team is spectacular," the former Everton coach reiterated.

"It was a game where we didn't have to just win, people were expecting a rout and that's what we produced.

"We didn't lose patience and I think we got better as the game went on in terms of control of play and speed of passing.

"I'm happy with the game and the goals, it's not easy to win a World Cup debut."

Next up for Martinez and his team are Tunisia, who suffered a last minute defeat to England.