Nikola PokrivaÄ ( born 26 November 1985 in Ä akovec , Croatia ) is a Croatian footballer who plays as defensive midfielder for Red Bull Salzburg in the Austrian Bundesliga . Nikola PokrivaÄ ( born 26 November 1985 in Ä akovec ) is a Croatian footballer who plays as defensive midfielder for Red Bull Salzburg in the Austrian Football Bundesliga .