Spurs say they are devastated by the death of Ventrone.
The Italian joined Spurs in the fall of 2021.
"As loveable off the pitch as he was demanding on it, he quickly became a hugely popular figure with players and staff," the club said.
Ventrone was a member of the Italy team that won the World Cup.
He died in Naples after being diagnosed with leukaemia.
He's held roles at a number of different places.
He will be missed by everyone at the club and our thoughts are with his family and friends.
Juventus added: "We will always remember his attention to detail, his work philosophy, and perhaps his greatest talent, the understanding that football - and especially the fundamental components of conditioning and athleticism - was gradually entering a new era.
He helped write a new era.