Inter edged out Livorno 1-0 at the Stadio Giuseppe Meazza to reach the quarter-finals of the Coppa Italia.
A brilliant second-half free kick from Wesley Sneijder proved to be enough to give Jose Mourinho's side a narrow victory.
Dejan Stankovic and Sneijder struck the woodwork in the first half as the hosts dominated proceedings against the struggling Tuscans.
Inter, who had a slightly rotated line-up but still included some of the big hitters, made the breakthrough on the hour mark when Sneijder curled in a free-kick from the edge of the box.
The rest of the last 16 fixtures take place over three days in mid-January with the Nerazzurri facing the winners of the Juventus and Napoli tie in the last eight.
Fifth Round Results
Wednesday 16 December 2009
Inter 1-0 Livorno
Fifth Round Fixtures
Tuesday 12 January 2010
Roma v Triestina (2000)
Wednesday 13 January 2010
Milan v Novara (1500)
Genoa v Catania (1730)
Juventus v Napoli (1945)
Thursday 14 January 2010
Fiorentina v Chievo (1500)
Udinese v Lumezzane (1730)
Lazio v Palermo (2000)
20/21/27/28 January 2010
Milan/Novara v Udinese/Lumezzane
Fiorentina/Chievo v Lazio/Palermo
Genoa/Catania v Roma/Triestina
Inter v Juventus/Napoli
* All kick-off times listed are UK time (+1 for Italy/CET). Times, dates and fixtures are subject to change.
Coppa Italia Fifth Round Reviews
[16 Dec 2009] - [12 Jan 2010] - [13 Jan 2010] - [14 Jan 2010]
Source: Sky Sports