NOTHING less than an “85-minute performance” at full tilt will be enough to halt all-conquering Saracens, admits Worcester Warriors wing Bryce Heem.

He says there’s no harder challenge in European club rugby than facing the defending Aviva Premiership champions tomorrow at Sixways (3pm).

Heem said: “The pressure is on at the bottom and we can’t hide from that.

“Saracens are a class outfit and they bring a lot to their game.

“On their day, Sarries are hard to beat and it will be a huge challenge for us.

“But if we can stick to our game-plan and not get side-tracked we can give any team a nudge.”

Auckland-born Heem continued his comeback after a finger injury with a try in Warriors’ 53-38 Anglo-Welsh Cup win against Cardiff Blues last Saturday.

But Heem, 28, believes Warriors must raise the bar “quite a bit” to stand a chance against the Champions Cup holders.

“In parts we played quite well against Cardiff but you need to put in an 85-minute performance at the top of your game to beat a side like Saracens,” said Heem.

“We need to raise the bar quite a bit.

“In the first 20 minutes we played quite well in Cardiff’s half which is what we wanted to do and we took advantage of some good opportunities.

“But, at times, we got a bit lost and didn’t stick to our game-plan and that reflected in points for Cardiff.

“Gary Gold has pointed out that we’ve conceded a lot in our half and we need to focus on playing down in the other team’s half.

"That means kicking to space and working hard on our kick-chase and getting our line set and forcing errors."

Heem has featured just five times this term, playing 80 minutes only twice.

He was struck down by a knee problem in pre-season and then damaged his finger in December.

“My body is feeling fresh and it’s been quite frustrating for me,” he said.

“Hopefully, I can push forward and have an outstanding game and play the full 80 minutes.

"It’s always tough not playing and when you’re injured you’re not with the full squad."

He added: “I snapped a tendon in my finger against Exeter Chiefs and it was never going to get better unless I got it fixed.

"I played the Wasps game and then had an operation.

"It was a niggly injury and something I could have kept playing with but I require the use of my hand so I needed to get it done.”