Chelsea are leaving Armando Broja off their preseason tour squad.
The forward, 20, caught the eye during his impressive loan spell at Southampton last term.
West Ham, Everton and Newcastle are all keen on signing him.
Ora News in his home country are reporting the player's representatives have told Stamford Bridge chiefs that he “must be part of pre-season" otherwise he will leave.
But Blues boss Thomas Tuchel believes it would be best for him to remain training in London rather than head out to the USA with the rest of his senior squad this month.
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