Lazio coach Simone Inzaghi was delighted with victory over Genoa.
Not since 1999 has Lazio been unbeaten after the first four games of the season.
After their 3-2 win, Inzaghi said: “We had a pretty first half, but I warned my team at the break that they weren't turning that possession into goals and in fact we left it open for them to equalise.
"We should've been at least 2-0 up, we had 18 shots to three.
“Fortunately Thomas Strakosha made that great save, as we lost Ervin Zukanovic on a corner, and it went well in the end. We deserved the victory."