Frosinone Calcio
In summer 2015, Lazović signed with Serie A team Genoa. In a friendly match against Hertha BSC on 1 August 2015, Lazović scored his first goal for Genoa in their 0–2 away win. On 8 November 2015, Lazović produced two assists in a 2–2 tie with Frosinone Calcio, and was subsequently named in the Serie A "Team of the Week". On 16 December 2016, Lazović scored his first goal for Genoa against Fiorentina, in a match that was only 62 minutes long as it was meant as a continuation of an unfinished match from September 11 which had been abandoned due to an unusual hailstorm. His contract expired and he left the club on 30 June 2019.