Man Utd are reportedly interested in signing ex-City striker Edin Dzeko from Roma.
The Red Devils let forwards Romelu Lukaku and Alexis Sanchez leave in the summer, and failed to secure a replacement.
This has left Ole Gunnar Solskjaer with only Marcus Rashford, Anthony Martial and teen starlet Mason Greenwood to choose from in attack.
Juventus forward Mario Mandzukic has been heavily linked with a £14million move to Old Trafford, but ESPN claim that interest has cooled given the Croatian's lack of involvement at Juve this season.
And United chiefs could now be about to turn to Edin Dzeko instead.
The 33-year-old bagged 72 goals in 189 appearances for Manchester City during his time at the Etihad between 2011 and 2016.
This even included a brace in City's 6-1 Manchester derby rout at Old Trafford on the way to the club's first Premier League title, under Roberto Mancini.
The Bosnian hitman has continued to be prolific since leaving Eastlands for Roma in 2016.
He has scored 93 goals in 194 games for the Romans, including an incredible 39 strikes in the 2016-17 season.