Newcastle United may face a battle to keep a hold of Bruno Guimaraes this summer. The midfielder has constantly said he’s happy at Newcastle and his recent reported purchase of a £4m home in the area may suggest he has plans to stay there. Still, there is believed to be interest in his services. Indeed, it was claimed earlier this month that there was a begrudging acceptance at St James’ Park that Guimaraes may have to move on as the club look to raise money to get onto the right side of the Premier League’s PSR rules. Paris Saint-Germain are understood be keen on a move for the 26-year-old, a…