Former Lyon midfielder Juninho Pernambucano has backed Doria to become a success at Marseille.
The 19-year-old defender moved to OM in the summer, but is yet to make an appearance for the Ligue 1 side.
However, Juninho, who spent eight years with OL, thinks that the youngster has all the tools to become a top star in France.
He told RMC: ‘This is a very interesting player. He is only 19 and this is a left-sided defender which is rare.
‘He has good speed and is very comfortable on the ball. He will have to play a little more to gain experience but I think he has all the tools to make a successful career with the club.’