Porto are inviting Premier League offers for their star players.
The People says despite Porto's success, they need to sell players to raise funds this summer.
Defender Rolando was recently watched by Manchester United scouts and Brazilian forward Hulk is being monitored by United and Tottenham.
Rolando's agent has confirmed the interest of United in the last week.
Click here for the No1 coverage of all the gossip and transfer news around Manchester United.