By Jude Summerfield Mikel Merino has completed a medical with Arsenal ahead of his €33.5m transfer from Spanish side Real Sociedad, reports have claimed. The Euro 2024 winner has been a long-term target for the Gunners throughout the summer window but a deal was only recently struck with Sociedad, who were keen not to lose the influential central midfielder. However, the breakthrough eventually came and the transfer is nearing completion with Fabrizio Romano reporting a medical has been completed and the two clubs are exchanging relevant documents. Merino made seven appearances during Spain’s …