The rough guide to: FC Sion

How did they get here?: Won the 2011 Swiss Cup

Star Player: Dragan Mrda

Analysis: Switzerland hasn't been the kindest of destinations for Celtic. Although the defeat to Basel in August 2002 ultimately proved a blessing in disguise as Martin O'Neill's side dropped down into the Uefa Cup for what was to be a memorable adventure, the bad memories of defeats to other Swiss sides FC Zurich and Neuchatel Xamax in the past two decades remain. Like those ties, this one with Sion is fraught with difficulty. The provincial club from the south-west of the country have been gradually on the up since financial problems saw them relegated and on the brink of bankruptcy in 2002.

They became the first Second Division side to win the Swiss Cup in 2006 and repeating that feat in 2009 and last season. That cup victory gained Sion access to this stage of the tournament, meaning they are one of the few unseeded sides that haven't already competed in Europe this season.

There will be a few familiar names for Celtic to contend with. Former Hearts defender Jos Gonalves signed this summer from St Gallen, whilst Pascal Feindouno, who was on trial with Celtic, has also joined from Monaco. The danger man, however, is Serbian international Dragan Mrda who scored eight times in 18 appearances in his first season in Switzerland last term.