Internazionale cemented their place in third spot with a 1-0 win over Sampdoria.
Adriano's first-half goal proved to be enough for Roberto Mancini's side.
The Brazilian ace put some disappointing performances behind him to grab the winner five minutes before the break.
The win was the perfect way for Inter to warm up for next week's UEFA Champions League clash with Ajax.
Siena piled the misery on basement boys Treviso with a late 1-0 win.
Erion Bogdani's late goal gave Siena all three points to inflict another defeat on strugglers Treviso.
Siena should have opened the scoring after 23 minutes when they were awarded a penalty, but Enrico Chiesa missed from the spot.
It looked like that miss may prove costly for Siena, until Bogdani popped up with the winner four minutes from time.
The win lifts Siena into the top half of the table, while Treviso continue to look down the barrel at relegation.