Parramatta Eels coach Jason Ryles has resisted blaming the officials over several controversial calls, insisting his side had only themselves to blame.

Racing to a 12-0 lead inside the opening 12 minutes through tries to Mitchell Moses and Jack Williams, the Eels looked set to pull off the upset of the season against the Penrith Panthers.

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However, a series of contentious calls went swung the momentum as the Panthers charged back into the contest and took the lead.

First, five-eighth Blaize Talagi looked to have lost the ball before Liam Henry scored.

Then, the Panthers seemed to benefit from a forward pass as they kept the ball alive before winger Thomas Jenkins crossed in the corner.

Despite those moments, Ryles refused to point the finger at the officials, admitting that the club’s own mistakes ultimately proved the difference.

“Every week you come in, I can have a little dig, but I choose not to because I understand how hard the job is,” Ryles said post-match.

“I thought BK’s [Brian Kelly] try (could have been a penalty try). If he impeded him to get the ball and he got so close to the ball, then possibly a penalty try?

“I don’t know. And then there was one where there was a forward pass and maybe a knock-on in the run of play. It was like gridiron.

“It’s disappointing when we’ve got so much technology and we’re willing to use it at times and other times we just don’t to help the referee out.

“Obviously they’ve got their touch judges there to help them as well.

“You can always look back at little things like that, but we were our own worst enemy there for periods of that game and those little moments add to that.”

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Meanwhile, Eels skipper Mitchell Moses echoed his coach’s assessment, insisting that the playing group only had themselves to blame for the loss.

“I don’t think it was the calls that hurt us,” Moses added.

“We kind of hurt ourselves in periods where we relieved some pressure.

“In pressure situations, we came up with some errors and some wrong decisions so we’ll have to learn from them and we’ll get better.

“But we’re learning on the run at the moment. It obviously hurts.

“We’re getting so close, but we put ourselves in a position to win the game. We just couldn’t finish it off.”