Matt Le Tissier has urged Southampton boss Ronald Koeman to sign striking reinforcements before the transfer window closes.
Didier Drogba was being linked with a sensational return to Chelsea on Wednesday after FIFA confirmed the Shanghai Shenhua striker had asked their permission to join another club on loan outside the transfer window.
FIFA told Press Association Sport in a statement: "We can confirm that the player, Didier Drogba, has submitted a request for authorisation to be registered outside an open registration period for a club on a loan basis.
"Our services are currently looking into the matter."
Drogba, who quit Chelsea after scoring the winning penalty in the Champions League final, has been considering training with his former club during the Chinese Super League off-season, something Di Matteo said he would welcome prior to his own departure on Wednesday morning.
But Drogba's request to join another team on loan to maintain his match fitness ahead of the African Nations Cup has sparked speculation the arrangement could prove something even more substantial.
Fernando Torres has been in miserable form and was dropped for Chelsea's Champions League defeat at Juventus on Tuesday night.
Existing FIFA rules prevent Drogba from representing another club until January 1.