Zarate definitely won't be involved in the squad after he refused the call-up for the match against Inter.
Petkovic has to deal with Candreva's absence so Lulic will play on the left flank and all of the usual midfield will move to the right.
Gonzalez will therefore play on the right wing.
Sampdoria just changed their manager after a controversial defeat in Catania, in the hope of stopping the bad streak before it becomes as long as the previous one. The Blucerchiati will now need some time to adapt to a new playing style, so Delio Rossi would settle for a point before winter break.
Lazio are now cemented in third position after Napoli's penalisation and currently in very good form having gone 10 matches without losing in all competitions. They will want to ensure their position in the table remains in the last match of the year to put pressure on their rivals during the break.
Rossi will probably have a balanced approach to the game, trying to use the flanks to feed his strikers. Eder could be asked to help the midfield, especially in pressing Ledesma. Petkovic will use his usual formation despite missing Candreva, and Lazio should be able to control the match unless they commit mistakes.
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