Both Premier League heavyweights made moves in the January transfer market.
The Gunners snapped up Pablo Mari and Cedric Soares as Mikel Arteta desperately looked to bolster his defence.
United, meanwhile, acquired Bruno Fernandes from Sporting Lisbon and Odion Ighalo on loan from Shanghai Greenland Shenhua.
However, the elite are already planning for the summer and it appears that Haksabanovic could be on the agenda.
The 20-year-old joined the Hammers in 2017 for £2.7m.
But despite moving to England over two years ago, he’s still yet to turn out for the east Londoners.
Nevertheless, Haksabanovic is on loan at Norrkoping in Sweden this season and has been impressing.
According to new outlet Fotbollskanalen , that prompted the Premier League duo to take a look at him against Brondy.
It’s suggested Rangers boss Steven Gerrard also had representatives from Ibrox watching him.
Haksabanovic is an attacking midfielder and has now bagged six goals in 30 games.
Arsenal could have done with some more flair against Burnley on Sunday.
Arteta’s men could only manage a 0-0 draw against Burnley.
In the aftermath of the match, the Spanish chief bizarrely blamed the state of the grass at Turf Moor.
"The conditions were difficult - the grass was this long and they didn't put any water on it, and that's not a very helpful thing to play football,” he explained.
"I didn't water the pitch yesterday at the training ground because I expected it, but that doesn't make it any easier to play.
"They do what they do really well, and you are allowed to do it so we have to react to that.
“In some moments it wasn't the grass - it was their quality and what they do really well, and we could not do it in the right way."