Arsenal have now jetted off for their pre-season trip to the United States but still await their first summer signing. However, there may now be a lot more confidence surrounding their summer business as they close in on one of their top targets. Riccardo Calafiori agreed to sign for Arsenal two weeks ago and finally a deal is being closed in on. The final steps are now being put in place for Calafiori to sign for Arsenal as the Gunners look to open their account for the summer. And it could be a case of London buses for Mikel Arteta with one of their other summer targets now keen to make the …