Arsenal boss Mikel Arteta has a big rebuilding job on his hands at the Emirates.
The Gunners won the FA Cup in 2019/20 but finished in eighth place in the Premier League, 43 points off champions Liverpool.
They are expected to do plenty of business this summer, with players coming in and out of the Emirates.Magalhaes was reportedly in contact with Manchester United but never held concrete talks with the Red Devils.
Instead, his decision came down to a choice between the Gunners and Napoli after both clubs had offers accepted for the Lille centre-back.
The Times have reported that Magalhaes has completed his medical with Arsenal and is poised to sign a five-year deal at the Emirates in a deal worth up to £27million.
And reports in Italy claim Napoli have resigned themselves to losing out to Arsenal in the race.