Arsenal have been fairly busy on the transfer front this summer and are expected to step up their activity in the coming days. The Gunners have already signed Riccardo Calafiori and are said to be on the verge of announcing the arrival of Mikel Merino. Arsenal have also been busy on the outgoings front, with seven players having left the Emirates Stadium since the end of last season. Mohamed Elneny, Cedric Soares and Arthur Okonkwo have left on free transfers, while Nuno Tavares, Albert Sambi Lokonga and Karl Hein have been loaned out. Arsenal have sold just one player so far this summer, and …