"Juventus know what they need," Lippi told the Gazzetta dello Sport.
"I see that the Juventus fans are a little sceptical of him, but he has great class and perhaps just needs a new challenge.
"Juve play total football where fatigue is evenly distributed. The attackers are asked to press, to drop back and that sometimes doesn't make them cool in front of goal.
"That's why they have been searching for a new striker for some time."