Mariano Diaz left Real Madrid as a backup striker last summer, only to go on and put together an excellent season with Lyon, scoring 21 goals.
He has been so impressive since his eight million euros move that Los Blancos are considering bringing him back to the Estadio Santiago Bernabeu.
They even made contact with the 24-year-old a few weeks ago to gauge his interest at a return to the Spanish capital.
He would be the main backup striker, holding a similar role in the squad to that of Alvaro Morata in 2016/17 and a role that was lacking in the 2017/18 campaign.
Raul de Tomas, meanwhile, is an option to come in as the team’s fourth-choice striker, behind Cristiano Ronaldo, Karim Benzema and, potentially, Mariano.
Although Real Madrid do not have a buy-back option in Mariano’s contract, they do have a good relationship with Lyon president Jean-Michel Aulas and they do have the right of first refusal should another club come in for him.
They would also earn 35 percent of another future transfer fee.