The Turin side has been linked with a number of strikers in the past few weeks, such as Didier Drogba and Fernando Llorente, as it aims to add some more firepower to the squad, but Marotta has stressed that the right opportunity has yet to come along this winter.
"I expect the January window to close without any big signings. The right opportunity has not presented itself to Juventus," Marotta told Sky Sport Italia. "We are obviously looking around and evaluating the situation of certain players, but our main objective at the moment is to recuperate injured players and those who will play at the [African Cup of Nations]."
Marotta also took the time to discuss Juventus' title chances following the recent loss to Sampdoria and draw with Parma, and stressed that it's impossible to win all games. Juventus currently holds a three-point lead over second-placed Lazio.
"There's no reason to be pessimistic. We should remain realistic," Marotta said. "Serie A is a bit like the Giro d'Italia. You simply cannot win every stage. It's the final standings that really matter."
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