Right-back
Hector Bellerin is set to leave the club. Calum Chambers and Cedric Soares did not set the world alight playing on the right side, so the Gunners need an upgrade.
Arteta is apparently looking for someone who can play an inverted right-back, i.e. a right-back who moves infield and operates as an additional central midfielder when in possession.
Names mentioned: Ben White (centre-back, can play at right-back), Tariq Lamptey, Tyler Adams, Zeki Celik.
Central midfielder
Dani Ceballos has already departed and Granit Xhaka is on the verge of a move to Italy.
Arsenal need someone to complement Thomas Partey and are in the market for a combative midfielder capable of quickly progressing the ball.
Names mentioned: Yves Bissouma, Albert Sambi Lokonga, Ruben Neves, Manuel Locatelli.
Playmaker
Emile Smith Rowe can't play week in, week out and we don't have anyone to replace him if he's injured.
While the returning Joe Willock could be an option, there is a lot of talk about Arsenal splashing the cash on a No. 10 to fill the creative void.
Names mentioned: Martin Odegaard, James Maddison, Houssem Aouar, Julian Brandt.