Lazio have moved up into third place in the Serie A table with a 3-0 win at Cagliari.
Lulic gave the visitors the lead after 40 minutes when he collected Djibril Cisse's pass before he lashed home from 25 yards.
It was 2-0 five minutes later when Cisse was again the provider as Miroslav Klose headed in his strike partner's cross.
The win was sealed two minutes from time as Tommaso Rocchi fired in.