The setback has cast doubt on the future of coach Gigi del Neri and several of the Juve squad.
"Due days of double training sessions have finished at Vinovo," Del Piero wrote on his official website. "From today onwards we are solely preparing for the game against Bologna.
"I am training well and the good weather here certainly helps you work in the best of ways.
"It's useless to underline how important it is for us to be playing at home again in light of the defeat away to Lecce.
"Our concentration is totally on finding the way to victory again and maintaining our course."