Goals from Joaquin Correa and Ciro Immobile helped Lazio to a 2-1 win at AC Milan on Sunday that saw them climb to fourth in the Serie A table.
Immobile's 100th Lazio goal put the capital club in the lead but mid-table Milan quickly levelled after Krzysztof Piatek's flick was diverted into his own net by Bastos.
After an end-to-end first half, both sides struggled for momentum after the interval and it took an exquisite pass from Luis Alberto to set up Lazio's winner.
The Spaniard cleverly found Correa and he did the rest, charging into the penalty area to slot an 83rd-minute winner.
Immobile started the match with 12 Serie A goals this season - two more than Milan - and after starting brightly, he hit the crossbar with a curling 22nd-minute effort.
The prolific striker was not to be denied and gave Lazio the lead with a superb glancing header from Manuel Lazzari's terrific cross from the right.
Lazio were more than deserving of their lead but were pegged back in the 28th minute through Bastos' own goal, and Milan were inches away from taking the lead when Hakan Calhanoglu's corner caught goalkeeper Thomas Strakosha off guard and nearly crept in.
Goalmouth action was minimal after the break but Lazio thought they had won a penalty after a challenge from Theo Hernandez on Lazzari. Referee Gianpaolo Calvarese was not interested, though.
Milan goalkeeper Gianluigi Donnarumma was alert to keep out a good Francesco Acerbi effort, too, as Lazio pressed for a match-winning goal.
And it came seven minutes from time when Alberto picked out Correa and the Argentina international calmly scored his third goal in five matches.
Immobile's milestone night
The Lazio striker showed why he is Serie A's top scorer with another terrific performance. Immobile's movement for his first-half header was outstanding, the forward cleverly creating space with a darting run before heading home in style. He could have easily scored more than once and linked superbly with the equally sharp Luis Alberto.
