He started the 2017–18 season as a starter. In his second league game against Benevento Calcio he suffered a thigh injury and has been replaced. On 22 October 2017, in his fifth match in Serie A against Atalanta B.C. he suffered a muscle injury and has been replaced. On 25 November 2017, he faced two yellow cards in the last two minutes of the first half, leaving his team with ten players without luckily to create a problem as his club prevailed with 3–0 against Sampdoria. Since the beginning of 2018, Torosidis faced a numerous of hamstring injuries as well as a muscle fatigue that kept him out of the squad for almost 1.5 months. On 5 April 2018, he completed Bologna's training and seem ready to return in action. On 1 July 2018, he mutually solved his contract with the club.