ROME, Dec 2 (Reuters) - Inter Milan reinforced their position on top of Serie A by cruising to a 2-0 home win over Siena on Saturday.
Goals by Argentine internationals Nicolas Burdisso and Hernan Crespo extended Inter's winning streak to 11 games in league and cup competitions and gave the leaders 36 points from 14 Serie A matches.
Second-placed AS Roma stayed four points behind after Francesco Totti scored two penalties in a 2-1 victory over Atalanta.
Siena were outclassed by Inter at the San Siro.
They fell behind in the 11th minute when Burdisso dashed into the box to head in a corner, the defender's third strike in two games after two replica goals in a 4-0 win over Messina in the Italian Cup in midweek.
The best chance of an equaliser came in the 50th minute when defender Douglas Maicon obstructed Luca Antonini to give away a penalty but Inter keeper Julio Cesar parried Mario Frick's spot kick.
Crespo wrapped up the win four minutes later. A clever pass by Zlatan Ibrahimovic sent the striker into the area and he jinked round a defender before chipping the ball coolly over keeper Alex Manninger.
Roma had a tougher time overcoming Atalanta at the Olympic Stadium.
The visitors were rewarded for a lively start in the 19th minute when Cristiano Doni cut the ball across the area for Massimo Donati to angle a shot goalwards.
Roma keeper Doni blocked his shot but could not prevent Riccardo Zampagna firing in the rebound.
Gradually Roma took control and in the 50th minute Simone Loria tripped Simone Perrotta before Totti fired home his first penalty.
Totti made it 2-1 after being upended by Giulio Migliaccio 12 minutes later.
The Roma captain's double took his tally for the season to nine goals, making him joint top scorer in the division with Messina striker Christian Rigano.
Atalanta's Massimo Donati was sent off late on for a second bookable offence.