England captain Jamie Peacock is anticipating another fiery clash when Leeds take on St Helens in Saturday's Grand Final and believes the spoils could go to the team that best keep their emotions in check.

Tempers flared when the sides met in engage Super League action last month, with Rhinos centre Keith Senior banned for flooring Saints second rower Jon Wilkin and second rower Jamie Jones-Buchanan punished for an alleged 'chicken-wing' tackle on James Graham.

An animated Graham pointedly refused to shake hands with the Leeds players at the end of the match and was accused of a lack of sportsmanship by his opponents, but Peacock understands the frustrations of his England front-row colleague.

"I think Jamma is just passionate and it overflowed a bit for him the last time," said Peacock.

"He's an important part of how they play and he is a player we need to look out for. I think passion is part of Jamma's game. It's good for him and good for the game.

"Rivalry is good in sport, it puts bums on seats. I look forward to playing Saints because it's difficult. It brings the best out of you because you have to perform at your best if you want to beat St Helens."

It is likely Graham's volatility will be tested to the full at Old Trafford and Peacock admits how he reacts could be pivotal to the outcome of the match.

"It's for Jamma to control," he said. "We can't control the mindsets of other players.

"Emotions are part of the game, it's controlling them and using them in the right way. If you become too emotional, it becomes detrimental to how you perform."

Leeds emerged victorious from that league match at Headingley and go to Old Trafford on a high with 13 wins from their last 14 games.

Saints, on the other hand, have only a 50 per cent return from their last dozen games but they have conceded just two tries in their two play-off games to suggest they are running back into form.

"I think Saints have performed in the last two games when they've needed to, which is a sign of a classy team," said Peacock.

"We could have played better in the last couple of games. We've done what is necessary to win. We're going in with form but I think Saints are going in with better form than people suggest."

The Rhinos are the bookmakers' favourites to complete a unique third successive Grand Final victory but Peacock, who holds the record for most winning appearances at Old Trafford with five, plays down the relevance of their 2007 and 2008 successes over their arch rivals.

"I don't think the last two years comes into it," he insisted. "You can't afford to spend time thinking out that.

"It would be nice to win three in a row but, if you concentrate on that, you've a chance of slipping up. We've got to concentrate on performing and, if we do that, history will take care of itself."

Only Saints stand-off Leon Pryce has more Grand Final experience than 31-year-old Peacock, who won three times with his former club Bradford and will be making his eighth appearance at Old Trafford on Saturday.

The England skipper claims a third successive victory would be the sweetest of all, removing any doubt over Leeds' superiority after their two previous wins came having finishing second in the table.

With the League Leaders' Shield already in the Headingley trophy cabinet, the Rhinos are determined to complete the "double".

"It was in all the players' minds," said Peacock. "Obviously we want to go out and win all the trophies that are available.

"But we got beat in the World Club Challenge and we couldn't win the Challenge Cup so we set our sights on the League Leaders' Shield and now the Super League trophy.

"It was important we did that, not only to remove any doubts but also to fulfil your own expectations as a player and as a club."