PROP Mike Cooper says there is one statistic Warrington Wolves must improve as the season reaches its climax.

Wire lost 16-14 at Hull KR on Saturday after conceding an avalanche of penalties including six in the first few minutes.

And while heroic goal line defence repelled wave after wave of attack from the home side, the inevitable happened and Adam Quinlan scored a late winner.

It sent Wire to a fifth Super League defeat of the season and left them six points behind leaders St Helens.

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Cooper says there will be one priority in training this week.

"We spoke in the week about two stats," he said. "We are second highest in the league for conceding penalties and the best for the lowest number of missed tackles.

"So it shows we can go to those dark places.

Warrington Guardian:

"But we need to stop giving away so many penalties.

"We have spoken about it but we will go away and speak about it again this week."

And he said the team failed to start well in either half.

"We did not play it well, it was one of the worst performances this year," said the former St George prop.

"We have played them four times this year and we knew we had to start well after the last time we came here.

"We talked about not being complacent in the week but we gave away six penalties in the first 17 minutes I think.

"There were a few debatable calls but you are going to get that here.

"We went in at half time though and spoke about having a big 20 minutes when the second half started.

"But it didn't happen. We had no good ball and had to rely on two or three bits of individual brilliance to score."

Warrington Guardian:

Bryson Goodwin came up with a piece of individual brilliance to score

On the positive side, the former England international was on top form again, playing big minutes and constantly leading the charge for the Wire.

"I feel like I am playing a lot of minutes," he added.

"I am pleased with my form but the aim is to go to another level for the end of the season.

"I want to peak when it matters."