Sky Sports are reporting that Madrid will attempt to bring the English global Raheem Sterling from the Etihad to the Santiago Bernabeu as new manager Julen Lopetegui tries the reclaim the crown from perennial rivals Barcelona.
Real are looking for striker options after selling Cristiano Ronaldo to Juventus this summer in a £105m deal.
The striker made a great start to life in France, scoring 18 league goals in 2017-18, but he has not found the net since April.
Castro has claimed that Mariano, 25, is yet to confirm his decision but the Sevilla president appeared to concede defeat in the battle.
OL - Mercato : Mariano au Real Madrid, ça devrait être pour 5 ans
Ils avaient une option, ils ont décidé de la lever. Il est sous contrat avec Lyon jusqu'en juin 2022. Nous attendons une réponse du joueur.
"The player told us he wanted to play at Sevilla, that he wanted to play in the Spanish league and, above all, that he wanted to play in a team who have won so many Europa League titles as Sevilla".
"We negotiated with Lyon and then they have 48 hours to decide".
The French giants could accelerate their efforts to sign the Frenchman from the Scottish champions before sealing Diaz's departure to Real Madrid.
"Am I annoyed with Real Madrid?". Not at all, this is football.
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In the end Mariano didn't go to the Premier League and Sevilla came into the picture, who are ready to bring in the play for 30 million euros plus another five, performance related. We have to keep working.
"We are very sorry about what happened, as injuries are the worst part of football, but we have no doubt that, with your professionalism and commitment, you will continue to give many joys to football fans".
"It's clear since the first day I arrived we want him, but the deals are the deals, and the agents are the agents, and the players are the players", said the ex-Barcelona coach. "There is nothing to be happy about here".
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