The Rhinos loose-forward has also leapt to the defence of team-mate Ben Walker, who has come under fire following a dip in form.

"The press are certainly writing Leeds off and talking about disruption in the camp and players not getting on," Sinfield told BBC Sport Online.

"But we showed against Bradford last weekend that we are a tight unit.

"There are going to be times when things don't go right, but everyone is behind Daryl (Powell) and the rest of the coaching staff.

"When we get two points on Friday, it will shut up those people who said we wouldn't make the play-offs."

Leeds have beaten the likes of Bradford and Wigan this season but are still not certain of a play-off spot because of their inconsistency.

That will change on Friday if they beat rivals London at Headingley.

As for Walker, he is looking to recapture the form that made him an instant hit following his move from NRL side Northern Eagles.

Sinfield is convinced the Australian's loss of form is only temporary and insists he will soon be firing on all cylinders again.

"Ben was left out of the side to face Bradford last week even though we were without several players because of injury," said Sinfield.