HULL KR coach Craig Sandercock says his side have made changes to their calls in a bid to confuse St Helens in today's Challenge Cup clash.
The Robins ran out 22-14 winners when Saints visited MS3 Craven Park in Super League just a fortnight ago.
And the Australian admits that has led to him tweaking parts of his game-plan in a bid to progress.
"Basically, we know how they are going to play and they are going to know how we are going to play," Sandercock told the Mail.
"There are a couple of little things we have done differently.
"We have changed the calls a little bit, not much, but there are a few things we want to do differently."
Whilst Rovers are strengthened by the return of first-choice stand-off Travis Burns, who missed the league clash through suspension, Saints have Ade Gardner and Tony Puletua back in action.
Sandercock feels the return of all those players will make it a different game, but says his side will enter the contest with confidence.
"We go into the game with some confidence, that's for sure.
"We know we can win, it's just a matter producing a good, consistent 80 minutes," he said.
"Maybe there is a little bit more pressure on the players because it's sudden death, but we need to compete the best we can.
"It's about us doing the best for the club and going as far as we can in the Challenge Cup.
"It's not just another game of rugby, it's sudden death.
"It doesn't matter if you play the Gloucester All Golds or St Helens, it's sudden death and that makes it that bit different."
