Rookie Milan coach Leonardo's horror half was compounded by Inter right back Maicon finishing off another fine one-two move with Argentina's Milito, to make it 3-0 just before the break.

In the second half Leonardo threw on Seedorf, new signing Klaas Jan Huntelaar and Massimo Ambrosini, who started on the bench despite being club captain following the retirement of the watching Paolo Maldini.

The trio stemmed the tide for a while until Dejan Stankovic blasted in from 25 metres midway through the second period to further embarrass Milan, who had looked bright in their 2-1 win at Siena on the opening day last Saturday.

Inter coach Mourinho had said Dutch playmaker Sneijder would not play, having only signed from Real Madrid on Friday, but it was a typical ploy from the charismatic Portuguese.

Sneijder had two good efforts from distance but wasted some dead ball situations after starting in place of Ghana midfielder Sulley Muntari, who Mourinho has said may be suffering with his energy levels because he is fasting for Ramadan.