Ronaldinho Hands Mourinho First Defeat at Inter

Inter have 10 points from five games, two behind surprise leaders Lazio, who won 3-1 at Torino earlier on Sunday.

A superb header by Ronaldinho helped AC Milan to beat Inter Milan 1-0 on Sunday and hand the Serie A champions their first defeat under new coach Jose Mourinho.

The Brazilian soared in the area and powerfully headed home a cross from his compatriot Kaka to settle the derby in the 37th minute.

Inter had defender Nicolas Burdisso sent off for a second yellow in the 77th and Marco Materazzi, who had been substituted, was also given a red card for dissent from the bench during the closing stages.

Inter have 10 points from five games, two behind surprise leaders Lazio, who won 3-1 at Torino earlier on Sunday.

Milan have nine after recovering from a slow start with their third consecutive league win.