Complex sentence: Hasi retired at the end of the 2007/2008 season, he will now become the assistant manager of his former club RSC Anderlecht, he signed a two year contract at the club in 2008.
Split into simpler sentences: Hasi retired at the end of the 2007--08 season and became the assistant manager of his former club RSC Anderlecht. He signed a two-year contract at the club in 2008.