Marseille defender Doria is expected to leave the Ligue 1 outfit after failing to settle in.
Doria’s agent Alexandre Gallo underlined his representatives frustration at not receiving any playing time this season.
“A player of his level should play. Doria is not angry, he remains quiet in his head. He is an intelligent boy, mature, he just waits to have his chance,” Gallo said.
Doria has not played a single minute of football in all competitions this season and is expected to leave in January.
The 20-year-old defender joined Marseille on a £4.4 million move from Botafogo last season and has five-years left on his contract.
Chelsea and Galatasaray have been closely linked with the young Brazilian.
Former Galatasaray manager Cesare Prandelli confirmed that Doria was on his transfer list this summer.
“After starting there was talk of Doria, Balanta, Marcelo and Douglas, we began to negotiate for the transfer and at least two of these names we want to add to our team,” Prandelli said.