Idrottsföreningen Elfsborg , more commonly known as IF Elfsborg or simply Elfsborg ( Swedish pronunciation: [ˈɛ̌lfsbɔrj] ), is a professional football club based in Borås , Sweden, and is affiliated to the Västergötlands Fotbollförbund . [ 2 ] They play in the Allsvenskan and have spent most of their history in the top tier of Swedish football . Their homeground is Borås Arena , where they have played since 17 April 2005. [ 3 ]
