United are the top flight’s third-highest scorers this season having averaged just over two goals in each of their 22 matches.
They’ve had to share the goals around of late though with Romelu Lukaku enduring a barren run and Zlatan Ibrahimovic struggling with a knee problem.
Jose Mourinho has young forwards Anthony Martial and Marcus Rashford among his ranks, with both capable of playing through the middle.
It seems the United gaffer is keen to add to his options though, with the latest reports suggesting Marega is on his radar.
According to French outlet Foot Mercato, United have been in touch with Porto regarding the 26-year-old’s availability.
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However, they are not alone in launching an enquiry for the striker, who’s netted 12 goals in 21 games this season.
Chelsea and Tottenham are said to be sniffing around Marega too as they look to boost their own attacks.
Fellow Premier League clubs Leicester and Brighton are mentioned as outsiders to snap up the Porto ace.
A deal for Marega will not come cheap this month though.
The Mali international has a £36m (€40m) buyout clause written into his Porto contract, which runs until 2020.