Mario Balotelli gave Nice an early lead, but it was not enough to prevent Lazio from emerging 3-1 winners at the Stade de Nice on Thursday.
Ciro Immobile scored twice in a 2-1 Lazio victory in Turin as Paulo Dybala failed to save Juventus from their first home defeat in Serie A in more than two years.
Roma won 2-0 away to AC Milan on Sunday, while leaders Napoli crushed Cagliari 3-0 and Juventus drew 2-2 at Atalanta.
Former QPR midfielder Adel Taarabt received a straight red card as nine-man Genoa lost 1-0 to Inter Milan.
Andre Silva scored a hat-trick as AC Milan cruised to an emphatic 5-1 win away to Austria Vienna in Europa League Group D.
Ciro Immobile scored a hat-trick as Lazio humbled new-look AC Milan 4-1 at the Stadio Olimpico on Sunday.
Nani has moved from Valencia to Lazio on a season-long loan deal.
The latest transfer news and rumours from around Europe as details emerge of Antoine Griezmann's release clause at Atletico Madrid.
Get the latest headlines from the sports pages of Saturday's European newspapers.
Monaco have continued to prepare for Kylian Mbappe's seemingly imminent departure by making Keita Balde their second signing of the day.
Monaco have reached a £27.9m agreement with Lazio to sign Keita Balde, according to Sky in Italy.
Suso spared AC Milan from the prospect of a frustrating home draw with Cagliari by whipping in a match-winning free-kick at San Siro.
Arsenal have been drawn with BATE, Cologne and Red Star Belgrade in the Europa League, while Everton face Lyon, Atalanta and Apollon Limassol.
Barcelona want to sign Manchester United striker Marcus Rashford next summer, plus more from Monday's European press.
With Arsenal and Everton in the hat, here's what you need to know ahead of Friday's Europa League draw...
Southampton have signed Lazio defender Wesley Hoedt on a five-year deal.
Big-spending AC Milan brush aside Crotone, Roma start with victory and Inter Milan cruise past Fiorentina. Here's the Serie A round-up...
All the latest transfer news from around Europe, with Chelsea reportedly set to replace Antonio Conte with Thomas Tuchel.
Lazio sporting director Ighli Tare has confirmed that Wesley Hoedt will be joining Southampton.
Ciro Immobile scored twice as Lazio held off a fightback from Juventus to win the Italian Super Cup 3-2 in Rome on Sunday.
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