Lazio came from behind to beat Serie A title rivals Inter Milan and move one point behind Juventus.
Inter, who were looking to return to the top, led through Ashley Young's volley - his first goal since moving from Manchester United last month.
But Serie A top scorer Ciro Immobile levelled with a penalty after he was fouled by Stefan de Vrij.
And Sergej Milinkovic-Savic's low finish from 14 yards out gave Simeone Inzaghi's Lazio victory.
It was only a second league defeat this season since Antonio Conte took over at Inter - who ended with five 2019-20 signings from the Premier League on the pitch.