Mikel Merino is a name Arsenal fans have heard aplenty throughout the summer. The Spain international is a primary target for Mikel Arteta as the 42-year-old aims to bring more control and poise to his midfield. Arsenal fans began to speculate after Fabrizio Romano revealed that Merino will miss Real Sociedad’s friendly against Union Berlin on Friday – although the reason has now been revealed… Why Mikel Merino will miss Real Sociedad vs Union BerlinA story from El Diario Vasco now states that the Real Sociedad No.8 will miss Friday’s friendly clash due to fitness issues – rather than his abse…