Complex sentence: Antunes made his official Roma debut on December 12,2007, during the UEFA Champions League match against Manchester United, and was chosen as Man of the match, in a poll conducted by the club's website.
Split into simpler sentences: Antunes made his official Roma debut on December 12,2007, during the UEFA Champions League match against Manchester United. He was chosen as man of the match in a poll conducted by the club's website.