Lazio, therefore, moved two points ahead of idle Juventus and eight ahead of Inter, which also had a game postponed last weekend
Immobile scored from the spot on 69 minutes and less than 60 seconds later set up Joaquin Correa for the second, before capping the comeback two minutes into injury time with his ninth goal in eight league games this term.
Bologna coach Sinisa Mihajlovic hailed his team for pulling off a 'miracle' to secure their top-flight survival with a 3-3 draw at Lazio.
Coppa Italia: Lazio lift trophy after two late goals help them beat Atlanta as fan violence mars final
Milinkovic-Savic's fine header set Lazio on their way with eight minutes left in the Coppa Italia final, seconds after coming on as a substitute, before Correa sealed victory against Atlanta in the closing moments of the match.
Coppa Italia: Lazio midfielder Joaquin Correa's late strike sinks AC Milan in game marred by fascist flash mob to reach final
Joaquin Correa's second-half winner sent Lazio into the Coppa Italia final with a 1-0 victory over AC Milan at the San Siro on Wednesday, in a game marred by away fans holding a far-right flash mob
Serie A: Felipe Caicedo, Ciro Immobile score as Lazio beat Roma; AC Milan continue impressive run with win against Sassuolo
Lazio made their rivals pay 18 minutes from time, as Immobile scored his 16th goal of the campaign only eight minutes after coming on as a substitute
Champions League: Bayern Munich ride on 1st leg victory to reach semis after goalless draw against 10-man Sevilla
Jupp Heynckes' Bayern Munich marched into another Champions League semi-final on Wednesday despite 10-man Sevilla holding them to a goalless draw at home in Wednesday's second leg.
Champions League: Jose Mourinho needs to solve selection jigsaw for Manchester United's crucial trip to Sevilla
Jose Mourinho needs to figure out what is the best way to play all his attacking options if Manchester United wish to make a deep run in the Champions
Joaquin Correa and Franco Vazquez scored as Sevilla advanced to a second Copa del Rey final in three years on Wednesday following a 3-1 aggregate victory over Leganes.
Liverpool's defence hasn't been strengthened this season and defensive lapses once again cost them as Sevilla scored from their only two shots on target.
Champions League: Liverpool's Jurgen Klopp says he made peace with Sevilla manager after stormy end to match
"I was not happy with him throwing the ball away but we’re fine," said Jurgen Klopp.
Champions League: Liverpool held by Sevilla in terse clash featuring two sendings-off and coaching staff spat
Liverpool were undermined by more defensive sloppiness and a missed penalty in a 2-2 draw with Sevilla in a Champions League match that featured two sendings-off and a spat between coaching staff at Anfield
Champions League: Cristiano Ronaldo scores brace on return in Real Madrid win, Tottenham end Wembley jinx
Cristiano Ronaldo grabbed a brace on his return from suspension, as Tottenham Hotspur defeated Dortmund 3-1 and Liverpool were held on their Champions League comeback.
Jamie Vardy's first Champions League goal gave Leicester City a lifeline in their last 16 tie despite going down 2-1 to Sevilla in Wednesday's first leg.