Porto face a battle to keep hold of Brazilian striker Hulk.
O Jogo says Manchester United are considering a move for Hulk after his performances against them in the Champions League.
Porto have slapped a £35 million asking price on Hulk, who may struggle to qualify for a British work permit should United make their interest concrete.
However, Porto also know that United were able to convince the Home Office about a deal for Anderson two years ago and are concerned the Premiership champs could return for their big centre-forward.


