Samuel scored with a diving header at the far post after Milan goalkeeper Christian Abbiati hesitated and failed to cut out Esteban Cambiasso's free kick.

Milan created far more chances and were in almost total control after Inter had midfielder Yuto Nagatomo sent off for a second bookable offence three minutes into the second half.

The defeat left Milan with only seven points from their first seven league games of the season. Inter have 15, four behind leaders Juvventus and Napoli.

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