Aina has joined Toro on a season-long loan.
Cairo enthused: "For our squad that already includes external quality and reliability we looked for a prospect like Ola Aina: a wing-back physically strong, fast and powerful, able to perform effectively on both sides.
"Developed in the Chelsea academy, with which he also gained important international experience before debuting in the first team and participating in the championship victory in 2017, Aina is an ambitious young man who can further improve in Torino his technical-tactical qualities.
"In the name of the whole club I am pleased to welcome him with great cordiality. Welcome to Granata!"