"Renato Veiga, who came off during the first half of the match against PSV Eindhoven, underwent diagnostic tests," Juventus said on Thursday.
"The examinations revealed an injury to the tendon of the plantaris gracilis in his right leg."
Media reports said Portugal's Veiga, who arrived at Juve in January and started all five of their matches this month, would miss two to three weeks.
Juventus are fourth in Serie A and visit Cagliari on Sunday.
