The Gunners are in desperate need of defensive reinforcements once again.
But with a limited budget to work with, Arsenal boss Unai Emery is struggling to land some of his top targets.
Meanwhile, over at Old Trafford, United are spending big on their backline this summer.
Aaron Wan-Bissaka has already arrived for £50m in recent weeks.
And the Sun are reporting that Maguire will soon be a United player after an £80m deal was agreed with Leicester.
The 26-year-old’s arrival will likely see him play alongside Victor Lindelof at the back.
Eric Bailly, Chris Smalling and Phil Jones will be the players battling it out for game time behind Solskjaer’s two main choices.
But Arsenal should be using Maguire’s arrival as a chance to revive their interest in Bailly.
The Ivorian has been a solid member of United’s squad in recent years, despite criticism from some sections of the United fanbase.
Bailly was wanted by Arsenal under Arsene Wenger – but a move failed to materialise.
Transfer guru Duncan Castles explained recently why a move to London didn’t work out for the former Villarreal star.
“They desperately need to improve in central defence. It’s been a priority area for them,” he told the Transfer Talk podcast.
“They’ve been looking at targets for some time.
“One of those targets was Eric Bailly but it seemed they could get to the transfer levels required to make a legitimate bid for Bailly without Champions League football, which they’ve missed out on.”
United also missed out on Champions League football last season, meaning Arsenal may now have a better chance of landing their former target.
Starsport understands Saliba is the club’s ideal choice in the centre of defence.
But Saint-Etienne are demanding that the 18-year-old is loaned back to them for another season.
To add, Tottenham have trumped Arsenal’s bid in recent days to put themselves in pole position for Saliba’s signature.
Bailly would provide far more experience than the Frenchman, while also taking roughly the same out of Emery’s transfer budget.