Newcastle United have confirmed midfielder Joey Barton will miss the start of the new Premier League season due to injury.

The summer signing from Manchester City damaged his foot against Carlisle on Saturday amid fears he had fractured a metatarsal.

Scans on the England international have now confirmed a partial fracture of the fifth metatarsal in his left foot, meaning six weeks on the sidelines.

"Joey Barton will have an operation on Monday after suffering a foot injury during Saturday's pre-season friendly at Carlisle," read a statement on the club's official website.

"The England international, who was skipper for the 1-1 draw at Brunton Park, sustained a partial fracture of the fifth metatarsal in his left foot.

"The Magpies expect Joey to return in six weeks."