Newcastle coach Michael Hagan will study the videotape of his team's loss to Parramatta on Friday night before deciding whether to take issue with referee Bill Harrigan's performance.

However, NRL referees boss Robert Finch said he didn't know what all the fuss was about while Knights skipper Andrew Johns defended the game's No.1 whistleblower.

Hagan was baffled by Harrigan's interpretations at Parramatta Stadium but was cautious in his comments following the match, won 30-12 by the Eels.

And he was still choosing his words carefully again today.

"I'll watch the video tomorrow and if I have any issues with Billy I'll go on with it," said Hagan.

"I have spoken to Robert (Finch) every week as per the normal process.

"I think we have to clarify in our own mind ... and then speak to him (Finch) about what the question marks are."

Harrigan caned the Knights 7-0 in the penalty count in the opening 20 minutes as the Eels skipped to a 12-0 lead after dominating possession.

Johns, who was clearly frustrated during the match, refused to blame Harrigan for Newcastle's poor start to the clash.

"I thought it was our fault. We weren't dominant enough so I thought the penalties were quite fair," Johns said.

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