Sergio Floccari struck twice on debut for Lazio in their 4-1 win over Livorno.
The Genoa striker has joined Lazio on a six-month loan and scored a brace in their impressive win.
Tommaso Rocchi was also on the scoresheet and Lazio coach Davide Ballardini said: "Today we had the right attitude.
"Tommaso Rocchi cannot dictate the play by himself, we needed someone with the physicality of Sergio Floccari."