Test captain Darren Lockyer says Melbourne's irresistible form and big match players should lead them to victory in Sunday's NRL grand final.

Lockyer is impressed with Parramatta's amazing late-season run, but believes the Storm's big-game experience means they are likely to walk away with a second premiership from their four straight grand final appearances.

"We played the Storm on the weekend (a 40-10 loss at Etihad Stadium), they're going to be pretty hard to beat," Lockyer told reporters on Wednesday.

"The form they've shown the last two games is very good.

"I know Parramatta's playing well too but I think the Storm ... and the fact that they've got some players that have played plenty of big games, they've played the last four grand finals, I think that's going to put them in good stead as well."

The champion five-eighth said the Eels' lack of a representative half would not be a telling factor in the ANZ Stadium decider.

"They're not going to change the way they've been playing and what they've been doing is working, so I don't think that's going to be an issue," he said.

"(But) this is the Storm's fourth grand final. That will put them in good stead when the game gets tight.

"They'll know what to do in the tough situations."

Kangaroos coach Tim Sheens is sitting on the fence, especially over the impact the showdown between fullbacks Billy Slater and Jarryd Hayne will have on his selections for the Four Nations tournament beginning next month.

"Everyone's trying to get me to buy in on that argument," Sheens said.

"They're both good players, I'm sure we'll find a spot for them, they're good enough to be in my team.

"I just want no injuries, that's all, all of the big name players to come through without an injury, that's all I'm concerned about.

"I sit on the fence in these games."

Cronulla captain Trent Barrett, a late reinforcement on the Kangaroos train-on squad, is hopeful of a Parramatta win for good mate Nathan Hindmarsh.

"If Parramatta win it's a bit of a fairytale for Hindy in particular," Barrett said.

"But Melbourne look good at this stage and I probably expect Melbourne to win, but fingers crossed that Parramatta can get a win."

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