- Inter beat their city rivals 2-1 to become Serie A champions for the 20th time
- As tempers flared between the two sides, three players were sent off late on
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Inter Milan became Serie A champions for the 20th time after beating city rivals AC Milan 2-1 in a gritty game at the San Siro.
Simone Inzaghi's side needed a win to secure the title and they looked set to take a comfortable three points after goals from Francesco Acerbi and Marcus Durham.
AC Milan put their bitter rivals on edge after Fikayo Tomori scored with ten minutes of stoppage time remaining.
The game ended in chaos as three players were sent off in the space of four stoppage time.
Despite late pressure from AC Milan, Inter remain 17 points ahead of their city rivals with five games remaining.
At the final whistle, Inzaghi burst onto the pitch to celebrate with his coaching staff and players.
Lautaro Martinez broke down in tears as he fell to the ground as his teammates hugged and celebrated in front of the fans.
Players unfurled signs bearing the number '20' to celebrate their historic title win – which moved them a point clear of AC Milan, but still 16 behind Juventus.
However, as Italian clubs receive one star for every ten league titles they win, the club will receive a second star on their kit.
It was Inzaghi's first Scudetto in his coaching career and his side had been top of the table for almost the entire season.
Inter took the lead in the 18th minute when Acerbi headed home from close range when Benjamin Pavard nodded in Federico DiMarco's corner.
Durham then drilled into the bottom corner from the edge of the area to give Inter a comfortable lead.
AC Milan were desperate not to be the title-winning side against their rivals and stepped up in the closing stages as Tomori headed in a rebound.
Tempers began to flare as AC Milan's Theo Hernandez and Inter defender Denzel Dumfries were sent off following the brawl.
AC Milan's David Calabria was shown a red card for violent conduct after elbowing an opponent while waiting for a corner.
It's been a disappointing week for AC Milan, who faced the club's ultras after their midweek exit from the Europa League to Italian rivals Roma.
Reports have surfaced that manager Stefano Pioli could be replaced at the end of the season.
Following the defeat to Inter, he said of the rumours: 'Me don't know Inzaghi seemed to struggle 14 months ago according to the media, look what he has achieved since then. I am happy here, I am working well and I think the team has room for improvement.
'We'll all see where we are at the end of the season and discuss that.'