Belgium sweat Romelu Lukaku fitness ahead of World Cup

Romelu Lukaku has sustained another hamstring injury, Internazionale said on Monday, in a major concern for Belgium ahead of the World Cup.

Lukaku's latest injury was revealed after medical tests and Inter said the striker "will be re-evaluated in a few days."

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On Tuesday, Belgium officials said Lukaku has not been ruled out of the tournament, with team doctor Kristof Sas describing the latest injury as a "setback" rather than a fatal blow to his chances of playing in Qatar.

"It is not yet a line through the issue, but it is a setback for the player himself, his club and the [Belgium national team]," Sas told HLN.

The World Cup starts in less than three weeks in Qatar, with Belgium beginning play in Group F on Nov. 23 against Canada, followed by matches with Morocco and Croatia.

Lukaku, who is Belgium's first-choice striker, has just returned after two months out with a hamstring injury. He came off the bench against Viktoria Plzen in the Champions League on Wednesday and Sampdoria in Serie A on Saturday.