Arsenal midfielder Fabio Vieira is now set to return to FC Porto on loan in search of more playing time, and this move will have implications on the rest of the squad. Arsenal already parted ways with Emile Smith Rowe this summer, in a move which could have led to more playing time for Vieira. However, the expected arrival of Mikel Merino this summer means that there is still no more room in midfield, and Vieira played on the right wing in pre-season. The 24-year-old failed to impose himself and win a place in the team, and Vieira will now join Porto in order to try and find his best form, but…