Bradford Bulls coach Mick Potter eyes upset at Warrington Wolves in the Carnegie Cup The Wolves are the 3-1 second favourites to reclaim the trophy they won at Wembley in 2009 and 2010, but Potter's Bulls defied the odds to beat both 2011 Grand Finalists Leeds and St Helens in the Super League at home this season and, beaten just once away from home, he says they can spring another upset on the road. The Wolves have yet to find the form that earned them the League Leaders" Shield in 2011 but coach Tony Smith saw signs in last Sunday's 54-6 rout of Castleford that they are getting close to their best. "Hopefully we can build on last week's performance," he said. We went a long way towards fixing some areas in our defence that we needed to. Sheffield Eagles will be calling on the spirit of 1998 when they meet Catalan Dragons for the first time in Perpignan on Saturday night. The Eagles, now a part-time Championship club, are 250-1 outsiders to repeat their famous Wembley victory over Wigan 14 years ago but hooker Andrew Henderson, who was in the Barrow team that knocked out Castleford two years ago, knows a one-off win is possible. "It will be a tough ask but you never say never in the Cup because anything can happen," said Henderson, who will be coming up against younger brother Ian. Catalan coach Trent Robinson plans to field a strong side as they look to reach their second final in five years.