LEIGH Centurions boss Darren Shaw wants a big improvement as he plans to overcome National League One leaders Castleford on Sunday.

But they will have to do it without five regulars who were all injured in last week's league victory over Sheffield.

It will be a tough test against one of the favourites for the title in Castleford, who are looking to bounce back after being relegated from engage Super League last season.

And Shaw wants to see his men step up a gear at Hilton Park.

"Against Sheffield we weren't clinical enough," said the Centurions coach.

"We're turning the ball over very cheaply and you can't afford to that against a side of the Tigers' quality.

"Our completion rate has got to improve if we want to put pressure on Castleford."

Tommy Grundy (foot), Rob Smyth (ribs), Danny Speakman (sternum), Chris Hill (ankle) and Tim Jonkers (elbow and knee) are all definitely unavailable for selection. There is also a doubt about Jimmy Taylor who was also injured against Sheffield.

Meanwhile, retiring Leigh Centurions skipper Paul Rowley dedicated his 400th and final career game to his first-ever junior coach, Norman Wilcock, who died recently.

It was an emotional Rowley who said his goodbyes after the Centurions saw off Sheffield.

Tears were never far away as he thanked the club, fellow players and supporters to bring down the curtain on his long career.

"I want to dedicate my final game to my first-ever coach, Norman Wilcock, who sadly died recently," said the former captain.

"Norman taught me a lot of the basics that stood me in good stead right through my career.

"I might not have achieved what I have done without his early guidance."