Juventus manager Claudio Ranieri said he agreed with the bosses to recruit new players in January to strengthen the squad in its Scudetto quest. “One thing is certain – before I signed a contract here I wanted to know that the project had a winning future. I can assure you that we will be bringing in a world-class player,” the former Chelsea and Valencia boss told Football Italia. “John Elkann has promised to spend and it's good to know that. Now it's up to us to use the money at our disposal wisely." These declarations come just a few days after President Giovanni Gigli confirmed that the club won't spend any money this winter. Juventus have been linked with Liverpool Malian midfielder Mohamed Sissoko due to the several injuries that hit this department. However, the report in Tuttosport suggested that Ranieri may be concerned by his defense due to Giorgio Chiellini's injury. Aston Villa's defender Olof Mellberg is a probable target for Juve.