Complex sentence: On 5 October 2007 Pierluigi Casiraghi called up Bolzoni to form part of the Italy national under-21 football team the 2009 Euro U- 21 qualification matches against Croatia and Greece.
Split into simpler sentences: On 5 October 2007 Pierluigi Casiraghi called up Bolzoni to form part of the Italy national under-21 football team. The national side will be involved in the 2009 UEFA European Under-21 Football Championship qualification matches against Croatia and Greece.