Trailing to what looked like being Enrico Delprato's winner for Parma heading into added time, Milan triumphed thanks to strikes from Tijjani Reijnders and Samuel Chukwueze.
Atalanta surged back to the top of the Serie A standings with a Charles De Ketelaere-inspired 3-2 win at home to Empoli on Sunday, while inconsistent Roma thrashed Parma 5-0
Romelu Lukaku made an immediate impact on his Napoli debut by netting the leveller which set up Saturday's last-gasp 2-1 win over 10-man Parma
Lautaro Martinez equalised with two minutes of normal time left and Francesco Acerbi headed the winner deep into extra time as Inter Milan beat Parma 2-1 on Tuesday in the Italian Cup
Gianluigi Buffon signed a new deal with Parma on Monday that will keep the veteran former Italy captain at the Serie B club until 2024
Lautaro Martinez nodded Inter Milan nine points clear at the top of Serie A with his winner five minutes from time in a tight 2-1 win over Torino on Sunday.
Serie A: Inter Milan held on for the three points to give themselves a cushion going into Monday's league game against fourth-placed Atalanta.
Federal Prosecutor opened the investigation after Gianluigi Buffon was overheard using a blasphemous expression when addressing teammate Manolo Portanova during Juventus's 4-0 win over Parma last weekend.
Cristiano Ronaldo, who missed a penalty in the midweek 1-1 draw with Atalanta, made amends with his third brace in four games.
Serie A: Cristiano Ronaldo scored a pair of penalties in his 100th appearance for Juventus in the club's 3-1 win over Genoa on Sunday.
Lecce lost 3-4 at home to mid-table Parma but would have dropped down to Serie B even if they had won as relegation rivals Genoa thumped Hellas Verona 3-0.
Gervinho gave Parma a first-half lead but Inter Milan fought back with headers from Stefan de Vrij and Bastoni to snatch a vital win.
Juraj Kucka grabbed a point for Parma with his 31st-minute leveller after Nicolas Nkoulou had nodded hosts Torino ahead.
Serie A will resume with fixtures which were called off when Italian sports was suspended on March 9 because of the coronavirus pandemic.
Just before the scheduled go-ahead for group training at Serie A clubs, two Parma players have tested positive for coronavirus and have been moved into isolation.
Serie A clubs unanimously voted on Friday to finish the 2019-20 season -- suspended since March 9 with Juventus leading Lazio by a point.
Inter Milan are two points behind Serie A leaders Juventus with promoted Lecce offering 50-year-old Antonio Conte a chance to take home three points.
Juventus battled to a 1-1 stalemate at lowly Lecce, but the defending champions still stay top in Serie A as nearest rivals Inter Milan drew 2-2 with Parma.