But in their search of a high-level deputy for Edin Dzeko, Roma have been in constant contact with Madrid for Mayoral.
Roma and Madrid were discussing the final details of a deal for Mayoral on Sunday.
Mayoral will renew his Madrid contract – expiring in 2021 – before joining Roma on loan with an option to buy.
The former Spain under-21 forward spent the last two seasons on loan at Levante, making a good impression.
On Saturday, Mayoral made a late substitute appearance for Madrid in their 3-2 win over Betis.