Although the transfer window will not open again until January, a number of players are already being linked with mid-season moves to Old Trafford.
The most surprising name put forward is that of Brazilian superstar Ronaldinho, whose situation at Barcelona is being monitored by United, according to the Star on Sunday.
Having missed out on signing the influential playmaker when David Beckham left Old Trafford in 2003, and with a wealth of attacking talent already in place, the chances of such a move materialising are slim.
Meanwhile, following rumours that United will rival Arsenal for the signature of defender Miguel Veloso, Sporting Lisbon have denied that the Reds have first option to sign the Portuguese U21 international.
Monaco striker Jeremy Menez is tipped to be at the centre of a transfer tug-of-war between United and Liverpool, who have both been alerted by the 20-year-old striker's displays this season.
According to the tabloids, United are definitely looking at the younger end of the market, with 17-year-old Nigerian starlet Macauley Chrisantus also linked, along with Partizan Belgrade's Stevan Jovetic.