VANCOUVER, July 5 : Switzerland are preparing for a fiery contest on and off the pitch against Colombia as they gear up for what they expect to be their toughest test of the tournament in Tuesday's World Cup round-of-16 clash, midfielder Ardon Jashari said on Sunday.Having experienced a hostile atmosphere in their 2-1 group-stage victory over co-hosts Canada, Jashari expects an equally passionate challenge from Colombia's supporters as Switzerland chase a place in the quarter-finals."I think we felt it the most against Canada - 90 per cent of the stadium was from Canada. I think this time it will be a little bit more special," Jashari told reporters."The Colombians are not only emotional on the pitch, but also in the stands. I think we also had that at the World Cup in Qatar with Brazil. N