The club competed in Serie A, the Coppa Italia, and the UEFA Europa League.

During the pre-season, Lazio bought Ederson from Lyon,[2] Antonio Candreva from Udinese[3] and Michaël Ciani from Bordeaux.

[4] Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.

Note 2: The first match that was played behind closed doors due to the punishment handed to Lazio by UEFA following racism issue of their 300 fans at Stadio Olimpico in a match against Borussia Mönchengladbach in second leg of 2012–13 UEFA Europa League round of 32.

[7] Note 3: The second match that was played behind closed doors due to the punishment handed to Lazio by UEFA following racism issue of their 300 fans at Stadio Olimpico in a match against Borussia Mönchengladbach in second leg of 2012–13 UEFA Europa League round of 32.