Newcastle United are thought to be in the market for a striker after Callum Wilson’s latest injury. The Tynesiders have managed to keep hold of Alexander Isak thus far despite interest from Arsenal and Chelsea, though, the need for a back-up forward is apparent. Wilson is expected to be sidelined for the start of the new Premier League season and given his previous injury woes, it’d be a risk to solely rely on him. So, with that said, Newcastle are thought to be looking at a highly rated number nine on the continent. READ MORE: Newcastle ready substantial bid for £42m player and have already c…