Lazio coach Vladimir Petkovic has questioned the desire of his players.
The Rome club have had a poor start to the season.
Petkovic said: "It's a bit of everything, really. Several players are not giving 100 per cent and this team works when all 11 players are in good shape. Last season we had many injury problems between February and March. We certainly want to and must give more.
"At the same time, we must give credit to Roma for their performance. We lost against Juventus and Roma, two teams who are objectively in front of us in the table, but the season is long and we'll try to catch the others up quickly."