Arsenal are facing late competition from AC Milan for Belgium international Yannick Carrasco having completed the signing of Dennis Suarez.
Barcelona confirmed the departure of Suarez, who had his medical in London on Wednesday, before taking the news down from their club website but the deal is understood to have gone through.
As with Suarez, Arsenal are attempting to negotiate a move for Carrasco on loan until the end of this season with an option to buy.
Arsenal had been offered the 25-year-old Belgium international before the window opened but have only now moved on the deal because Inter Milan are not expected to allow Ivan Perisic to leave on loan despite the Croatian submitting a transfer request. Inter had considered Carrasco as a replacement for Perisic should they have sold him to Arsenal.
Carrasco is desperate to leave Chinese club Dalian Yifang and return to Europe and has been offered to a number of clubs with Milan also expressing an interest. It pits Arsenal in a head-to-head with their former chief executive Ivan Gazidis who left them to take on the CEO role at Milan.