GALLIPOLI - Inter's Allievi Nazionali team made a losing start to the final phase of the Under-17 championship.
Daniele Bernazzani's boys were beaten 1-0 by AC Milan - the first derby defeat for an Inter team this season.
Inter now need to beat Chievo in their second fixture on Tuesday to stand a chance of qualifying for the final.
Inter's remaining fixtures:
Tues 5 June: Chievo v Inter (18:30, Stadio Comunale, Taurisano)
Thurs 7 June. Inter v Brescia (10:30, Campo Capozza, Casarano)