Sept 26 (Reuters) - Newcastle United's Harvey Barnes could be set for a lengthy spell on the sidelines, as his manager Eddie Howe confirmed on Tuesday that the foot injury is a serious one. Barnes, who signed from Leicester City in July, was forced off with the injury in the 12th minute of Newcastle's 8-0 win at Sheffield United on Sunday. I think it's quite a substantial injury," Howe told reporters ahead of Newcastle's League Cup game against Manchester City. Anthony Gordon replaced Barnes in the thumping of Sheffield United, and was one of eight different scorers in that game. Newcastle, who lost to Manchester United in last season's League Cup final, host Manchester City in the third round of the competition on Wednesday.

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Persons: Newcastle United's Harvey Barnes, Eddie Howe, Barnes, Howe, We've, Anthony Gordon, He's, What's, Gordon, Trevor Stynes, Christian Radnedge Organizations: Newcastle, Leicester City, Sheffield United, Newcastle's League, Manchester City, Everton, Manchester United, League, Thomson Locations: Newcastle