United have been constantly linked with the Chilean midfielder this summer with the latest reports suggest they could be ready to offer as much as £47m for his services.
The Bianconeri chief spoke to Sky Sport Italia ahead of the Serie A fixtures being drawn up and was asked about the persistent rumours that 27-year-old could be on his way to Old Trafford.
“We recently renewed his contract because we knew that we could count on an important element. He has not taken any different position to what he thought before," Marotta saide.
"“Transfer gossip is normal on one of the best players in circulation. We have never activated a plan to sell the player.
“We’ll be happy to keep the player if he wants to stay.”
Marotta also said the club was close to completing the signing of versatile Verona star Romulo.
"I certainly cannot deny talks with Verona for Romulo. There are situations that need to be defined, but we can complete the move within 24 hours,” he said about the midfielder who can also play right-back.
Many have suggested Roma are the new favourites for the Scudetto, especially after Antonio Conte quit to be replaced by Massimiliano Allegri.
“Our squad is well constructed, we are reigning champions and the group deserved its praise. We are ready to take any opportunities that present themselves," Marotta saide.
“A defender and a striker can be objectives, but I won’t say anything so as to avoid creating expectations.
“We are targeting a fourth consecutive Scudetto. Roma have without doubt reinforced and were already a fearsome prospect last season.”
Juventus and Roma were the only clubs not to support Carlo Tavecchio for FIGC President, though others are joining them after a racism row.
“We always considered him inadequate for the role and our position has not changed. We’re seeing some other clubs are reconsidering their position, so we’ll see what happen," confirmed Marotta.
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