Immobile struck his first just seconds after Daniele Verde had given Spezia a shock fourth-minute lead in Rome, levelling the scores with a delicate dinked finish and then ramming home the second 10 minutes later with a first-time strike from just outside the penalty area. The 31-year-old then missed a penalty in first half stoppage-time only to nod home completely unmarked from the subsequent corner to complete his treble.
Felipe Anderson, Elseid Hysaj and Luis Alberto -- who also created three of the goals -- added three more stylish strikes after the break as Lazio put on a show of passing football that belied new coach Maurizio Sarri's pre-match complaints about what he called a "shameful" Stadio Olimpico pitch.