United are thought to be on the trail of the Italy international, who scored once in 14 top-flight appearances this season.
Claudio is a player who grew up in the Juventus youth teams and he loves the shirt
The 27-year-old has been one of the driving forces behind Juve’s recent success, helping the Turin outfit win back-to-back Serie A titles in 2012 and 2013.
With David Moyes being left frustrated in his attempts to sign Barcelona’s Cesc Fàbregas in the summer, the United boss was spotted attending Juve’s 4-1 victory over Cagliari.
However Marotta played down the ongoing speculation, insisting Marchisio is happy at Juve.
“There is no problem with Marchisio. Claudio is a player who grew up in the Juventus youth teams and he loves the shirt,” Marotta said.
“During a busy season it is inevitable that every player will have their lows, but everything is normal.”
Marotta also moved to clarify the futures of Andrea Pirlo and Paul Pogba, who have both been linked with January moves away from Turin.
“Pirlo’s contract? He said last week that he feels happy here. We have talked with each other and in February we will find a solution to continue together.
“Pogba? We don’t want to sell him and we close the door to any possible buyers.”
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