PSV Eindhoven coach Ronald Koeman is waiting to see if three of his top stars stay at the club.
Brazilian defender Alex, Jefferson Farfan and Jan Vennegoor of Hesselink have all been strongly linked with a move away from the Philips Stadion.
Chelsea are thought to be keen on bringing Alex to Stamford Bridge after loaning him out for the last two seasons to PSV.
Peruvian ace Farfan could be set for a move to Portsmouth after holding talks with the Fratton Park outfit.
Porto are thought to be keen on signing Dutch international Vennegoor of Hesselink and Koeman wants the futures of the trio clarified soon, so that he can bring in any replacements if they do move on.
"I hope to get a decisive answer today or tomorrow (about Alex), " said Koeman.
"If clubs play the amounts that PSV want, you can't stop it most of the time."