Inter Milan won its 15th Serie A title on Sunday after defeating Siena 2-1 with a double strike from Marco Materazzi in the 18th and 60th minute to clinch the Scudetto with 5 games remaining. Materazzi scored in the 18th minute after a goalmouth scramble following Lusi Figo’s corner but Siena got an equaliser through Paolo Negro’s headed effort in the 21st minute before Materazzi’s twice taken penalty ensured the club’s 15th Scudetto in the 60th minute.