Bradford Bulls coach Brian Noble has admitted injuries could have a big say in the side's bid to retain the Silk Cut Challenge Cup.

Noble goes into tonight's West Yorkshire derby against Wakefield Trinity at Belle Vue without winger Tevita Vaikona and Michael Withers while Aussie back-rower Daniel Gartner faces a late test on an arm injury which has kept him out of the last two games.

In addition England three-quarter Nathan McAvoy is still three weeks away from fitness and the arrival of Leeds Tykes winger Graham Mackay may be delayed until the second week in May due to a postponement last weekend.

"We are also starting to pick up one or two bumps and bruises which aren't going away as quickly," admitted Noble. "When you look at the fixture list we have coming up there really is no place to hide.

"I know it's the same for every side but the result against St Helens in the final could hinge on injuries."

With that in mind Noble's message tonight will be: "Get the job done and then we can take stock for the Wigan game on Easter Monday.

"Wakefield are one of the sides where you can't allow any complacency to creep in or you could be embarrassed.

"It has had to be a short week for training because if you overdo it there would be nothing left in the tank. But we have had one good session and the players were very sharp and focused."

Wakefield have a major doubt over former Castleford half-back Brad Davis and David March stands-by to deputise.

Davis, who also missed the Challenge Cup quarter-final defeat by the Bulls, picked up a knee injury in the 24-0 defeat at St Helens last Friday.

Experienced back-rower Gary Price has missed the last few games with shoulder trouble and is again expected to miss out.

The Bulls are holding an Open Day for fans at Odsal next Tuesday between 12noon and 4pm.

"It's a great opportunity for the fans to come along and meet the squad," said media manager Stuart Duffy. "They will also have the opportunity to buy merchandise ahead of the cup final.

"We held a similar event last season and it proved a big success."

Meanwhile, Robbie Paul has admitted he would be open to persuasion if approached by rugby union chiefs about representing England.

The Bulls skipper conceded he had not ruled out switching codes.

The New Zealand international, who would qualify to play for Clive Woodward's union side through his mother, said: "I would never say no to any opportunity, but that opportunity has not come to me.

"If there was a good deal there I'd have to consider it as I've got a young family to take care of."