Manchester United are closely monitoring the situation of Real Sociedad midfielder Mikel Merino as he stalls on a new contract. United will surely add at least one new midfielder this summer. Casemiro has taken a big step back this season and Sofyan Amrabat’s loan spell from Fiorentina surely won’t be made permanent. Kobbie Mainoo’s rise has been great to watch but United clearly need more quality in the middle with an interesting rumour emerging in Spain… Manchester United want Mikel MerinoCOPE report that United are one of a host of clubs closely following the performances of Real Sociedad s…