UPDATE 4-Soccer-Inter land Serie A title after Milan lose

* Inter win fourth straight scudetto without playing

* Milan lose 2-1 at Udinese to hand rivals the title

(Adds Mourinho, Ibrahimovic quotes)

By Mark Meadows

MILAN, May 16 (Reuters) - Inter Milan retained their Serie A title with three games to spare after second-placed AC Milan put in a weak performance to lose 2-1 at Udinese on Saturday.

Inter's triumph, in former Chelsea coach Jose Mourinho's first season in charge, is their fourth straight scudetto and their 17th overall.

The champions, who will celebrate their success in Sunday's home match with Siena (1830 GMT), hold a seven-point lead with Milan only having two games left.

Fans quickly congregated in Milan's central square, Piazza Duomo, to wave flags and celebrate the title while television pictures showed Inter players dancing at their team retreat.

Mourinho has now won titles with Porto, Chelsea and Inter.