Match ends, Sassuolo 3, Inter Milan 1.
Inter Milan boss Roberto Mancini admits his team are a bit "fragile" after suffering a 3-1 defeat at Sassuolo.
Inter won 7-0 when the sides met in the autumn, and beat them by the same scoreline in last season's away game.
Simone Zaza and Nicola Sansone gave the hosts a 2-0 half-time lead and, after Mauro Icardi pulled one back, Domenico Berardi sealed it in the 90th minute.
"The team is clearly a bit fragile as we suffer at the first sign of difficulty," Mancini said.
"We commit too many mistakes. Nothing's going right for us at the moment, so we need to improve.
"We've improved in terms of our possession but we definitely need something more in the final third. It's all going a bit wrong for us at the minute and the lads are down as a result.
"But that's a football match for you - it can all change in an instant. The result is all that matters, but the defeat shouldn't change our approach."
Both teams ended the game with 10 men after Sassuolo striker Sansone and Inter defender Isaac Donkor were dismissed late in the game.
Sansone, who was already on a yellow card, was sent off after bringing down Inter midfielder Xherdan Shaqiri.
Donkor, also with a booking against his name, was dismissed for a foul on Sassuolo striker Zaza, and Berardi slotted home the subsequent penalty.
Inter - who hired Mancini for his second spell in November - are down to 12th, with Sassuolo - in only their second top-flight season - overtaking them by moving up to eighth.
"Sometimes there can be discord between the fans and the team, but I hope we can sort that out because we need our supporters," former Manchester City boss Mancini said.
- 26TerranovaSubstituted forBrighiat 82'minutes
- 3LonghiSubstituted forGazzolaat 61'minutes
- 7MissiroliBooked at 9minsSubstituted forAnteiat 75'minutes
- 25BerardiBooked at 85mins
- 10ZazaBooked at 11mins
- 17SansoneBooked at 90mins
- 54DonkorBooked at 90mins
- 23RanocchiaBooked at 21mins
- 15VidicBooked at 66minsSubstituted forBrozovicat 70'minutes
- 22Pires Ribeiro
- 18MedelBooked at 90mins
- 11PodolskiSubstituted forIcardiat 56'minutesBooked at 83mins
- 8PalacioSubstituted forPuscasat 78'minutes
- 88de Carvalho Andrade Lima
- Paolo Valeri
- Shots on Target
Second Half ends, Sassuolo 3, Inter Milan 1.
Attempt missed. Andrea Ranocchia (Inter Milan) right footed shot from the left side of the box is too high. Assisted by Xherdan Shaqiri with a cross following a set piece situation.
Fredy Guarín (Inter Milan) wins a free kick in the attacking half.
Dangerous play by Davide Biondini (Sassuolo).
Goal! Sassuolo 3, Inter Milan 1. Domenico Berardi (Sassuolo) converts the penalty with a left footed shot to the bottom right corner.
Second yellow card to Isaac Donkor (Inter Milan) for a bad foul.
Penalty conceded by Isaac Donkor (Inter Milan) after a foul in the penalty area.
Penalty Sassuolo. Simone Zaza draws a foul in the penalty area.
Gary Medel (Inter Milan) is shown the yellow card for a bad foul.
Foul by Gary Medel (Inter Milan).
Domenico Berardi (Sassuolo) wins a free kick in the attacking half.
Second yellow card to Nicola Sansone (Sassuolo).
Fredy Guarín (Inter Milan) wins a free kick in the defensive half.
Dangerous play by Nicola Sansone (Sassuolo).
Corner, Sassuolo. Conceded by Andrea Ranocchia.
Attempt blocked. Simone Zaza (Sassuolo) left footed shot from the left side of the box is blocked. Assisted by Matteo Brighi.
Andrea Ranocchia (Inter Milan) wins a free kick in the defensive half.
Foul by Simone Zaza (Sassuolo).
Foul by Mateo Kovacic (Inter Milan).