David signed before Juve last week after he took Lille's contract.
Tardelli said about the international striker of Canada: “I hope David also succeeds in Turin. He has scored a lot in France in recent years and never scored fewer than 25 goals.
“However, Juventus is not Lille, and it is not easy to maintain that level in the Serie A. If he asked me for advice? It would not require a long speech, just a few words: at Juventus you have to score and win goals.”
On Dusan Vlahovic who may get a free transfer, Tardelli also told La Gazzetta Dello Sport: “Leaving a free transfer is not in anyone's interest, neither Juventus nor Vlahovic.
“The Bianconeri would not earn anything next summer. But the Serbian would, by playing less or at least not enough, running the risk of losing his national team in the year of the World Cup. Dusan and the club should talk and find a compromise to end a story that best ends a story that started great but then did not meet expectations.
'Milan or abroad? If I have to cash in, I will even sell it to Milan. Selling is a good idea, but not a freebies. “