The Mikel Merino to Arsenal transfer saga is getting a bit tense for both parties. The Gunners are desperate to reinforce their midfield after strengthening their backline. David Raya has been signed permanently after his successful loan spell and Riccardo Calafiori has been brought in as well. A new midfielder is now the priority for Mikel Arteta, and TBR Football exclusively revealed in July that Merino has emerged as Arsenal’s top target. All signs pointed towards Merino moving to the Emirates, but recent developments have led to some nervousness in both camps. Mikel Merino and Arsenal have…