Arsenal have been slow to get going in this summer transfer window so far with just one new major signing arriving so far. Indeed, Riccardo Calafiori is the only major signing Arsenal have made this summer. However, that could soon be about to change. Mikel Merino has been strongly linked with a move to Arsenal, and now, it sounds as though this deal is going to be finalised. Mikel Merino to Arsenal will be done next weekAccording to Arsenal insider, Team News and Ticks, writing on his Patreon page, Arsenal are set to sign Merino next week. The reporter says that while he hates to describe tra…