Mayoral, 20, spent last season on loan in Germany with Wolfsburg, scoring twice in 21 appearances for the Bundesliga outfit.
The Spain Under-21 international has been tipped to leave Real Madrid on another short-term move this summer, and Indias has said that his club 'believe they are favourites' for the centre-forward.
"It's a bit like a year ago with Mariano [Diaz], Borja Mayoral is a player that will probably have a lot of suitors," Indias told AS.
"Real Madrid have not yet indicated that he will be allowed to depart the club this summer. We will see if he leaves Madrid, but if he does we believe we are favourites. This is a case that could go on for a while but we are hopeful a deal will be struck."
Mayoral has failed to score in six senior appearances for Real Madrid.