Lazio boss Simone Inzaghi was relieved with their 1-0 win over Udinese.
Ciro Immobile's second half penalty was enough to earn the Biancocelesti a hard-fought victory at the Stadio Olimpico.
"We have played better on other occasions," Inzaghi told reporters after the final whistle. "We were missing some important players, but I think at the end of the day the win was deserved.
"We were tired but we got more points - now we have 50. From this evening, we can think about the match on Wednesday [the Coppa Italia semi-final with Roma].
"I am satisfied with our points haul, we are running. Today we created less chances but we needed to win and we did. We'll keep working."