Lowly York scent shock Wolves win

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"We've watched some videos of Warrington and we think we can see some weaknesses there," said March, whose equally combative twin brother, David, is also in the City Knights' line-up. "It's up to us to see if we can exploit them. If we get some points on the board it puts a bit of pressure on them."

The Wolves, who have broken their losing habit in Super League with two victories, have Garreth Carvell back from injury and Ben Westwood from suspension, so Tony Smith takes the opportunity to give a well-earned rest to Adrian Morley. Also in the squad is Martin Gleeson, at the end of a week that has seen him repeatedly linked with a move to Wigan.

Two Super League sides whose form has surprised many this season meet at the Stoop, where Huddersfield are Harlequins' visitors.

Quins coach Brian McDermott adds four players to the squad that beat Hull last week, with Luke Williamson, Chad Robinson, Will Sharp and Matt Gafa all fit for action. Huddersfield include their new signing Liam Fulton, although he might have to wait a little longer for his debut.

For most, the event of the weekend will be at Headingley tomorrow, where Leeds and St Helens resume their running battle. Saints' full-back Paul Wellens this week denied there was any personal animosity between the sides, but that was not the way it looked when they met a couple of weeks ago.

Ryan Bailey, who was at the centre of much of the conflict that day, could be fit to return for Leeds and is included in a 19-man squad, along with the Test hooker Danny Buderus, who has hardly played since arriving from Australia. Sean Long is ruled out for Saints, but James Roby is fit to take his place at scrum-half.

Meanwhile, Bradford take 18-year-old Tom Olbison to France for the meeting with Catalans Dragons. The back-rower is in line to make his debut in place of Glenn Morrison, who learned this week that he will be out for three months with ruptured wrist tendons.

The other all-Super League tie is tomorrow at Hull, where it is hard to see much joy for Salford, currently on a six-match losing streak. The Reds' long-serving centre Stuart Littler will break David Watkins' record of 140 consecutive games if he plays.

Castleford, who are at Keighley, have terminated the contract of Steve Hayward, who was convicted of assault alongside Hull KR's Ben Cockayne this week.