Manchester United 'to trigger release clause' after Newcastle stand firm on Lewis Hall

Standard Sport understands that Newcastle defender Hall has long had admirers at United, and there is strong interest this summer, but any deal will prove extremely complicated this summer.Newcastle have already lost Anthony Gordon and Sandro Tonali this summer, and are set to lose captain Bruno Guimaraes to Arsenal. A fourth key player leaving is unthinkable.United are in the market for a new left-back with Luke Shaw, 31, having now entered the final 12 months of his contract at Old Trafford.There had been links with versatile Arsenal defender Myles Lewis-Skelly, but Standard Sport understands that the player will be not pursued this summer.The Red Devils are currently assessing what their priority position is heading into the final month of the summer transfer window, with reinforcements