It's probably because he got linked to Chelsea. He wants to move to England but Man Utd only and unfortunately we have no room. So he would probably rather stay at Porto.
If he moved to Chelsea it would be a bad option! He should stay at Porto for another season atleast...I mean he could be another Shevkenko flop and ruin his career!
Yes Falcao thats more like it...
Need to get a contract renewal to upgrde your release clause to 45million... that will suit you better...