Juventus manager Massimiliano Allegri has defended his decision to limit the playing time of Daniele Rugani.
The young defender's agent had recently complained that Juve did not give the 21-year-old enough playing time - having played just 39 minutes in the league.
But Allegri claimed Rugani is "one for the future" with defenders such as Giorgio Chiellini, Andrea Barzagli and Leonardo Bonucci all ahead of him.
Allegri told the press: “I don't know what Rugani's agent said, I can only reply that he wouldn't be doing his job if he didn't ask for him to play.
“But I'm the Coach and my own job involves knowing when Rugani has to play. He's a young kid and he'll be part of the January transfer window until the end. I think he'll be part of Juventus too, for many years.
“But I think Juve already have some important players in defence, like Chiellini, Barzagli, Bonucci, or like Caceres, who did well after almost six months without playing time.
“Rugani did well too in the derby. I might play him tomorrow.
Juve face Sampdoria in the Serie A on Saturday, and Allegri has told his players they need to be wary of an upset.
He added: “Sampdoria played a good derby, in fact an excellent one for a full hour, and they emerge from two good games against Palermo and Lazio.
“We'll come into an enthusiastic environment. They scored 27 goals, only 4 less than Juventus, who conceded 28. When they play at home they have substantial quality.
“They have Eder, [Luis] Muriel, [Carlos] Carbonero, [Roberto] Soriano, and then there's [Antonio] Cassano, who returned to a good condition and can create play and put all of his teammates in a condition to score.
“So this game no less than all the others is going to be complicated, because we're up against a team with good technique."