Manolo Gabbiadini's second-half strike cancelled out Miroslav Klose's opener as Lazio and Napoli drew 1-1 in first leg of a Coppa Italia semi-final
Napoli missed the chance to move level with second-placed Roma in Serie A as they lost 1-0 at Torino on Sunday.
Torino rounded off a memorable week for them with a 1-0 win over Napoli.
Napoli moved to within three points of second-placed Roma in Serie A thanks to a 2-0 win over Sassuolo.
Inter Milan battled to a third straight Serie A win, 2-1 at Cagliari, while third-placed Napoli beat Sassuolo 2-0 on Monday.
Leaders Juventus were held to a 2-2 draw by struggling Cesena, missing a late chance to win the game from a penalty.