Sassuolo fought back late but Inter held on to edge a chaotic seven-goal contest thanks to Lautaro Martinez and Romelu Lukaku braces.
Romelu Lukaku and Lautaro Martinez combined brilliantly as Inter survived a late Sassuolo recovery to win 4-3 at Mapei Stadium on Sunday.
Defeat to Juventus before the international break shunted Antonio Conte's men down to second in Serie A but a superb performances from their front two trimmed the margin at the top back to a point.