SKY Sports commentator Miles Harrison believes Worcester need to play an all-court match' if they are to record the victory against Saracens which should ensure their Premiership status for another season.

Harrison will be behind the mic tomorrow at Sixways on what promises to be a nerve-jangling afternoon.

Northampton Saints host London Irish at the same time and they can overtake Worcester by taking two points more from that game.

"Anybody who says they know what is going to happen is an absolute liar," said Harrison.

"But, of the two teams down there, I think Northampton are better placed.

"London Irish can't change position. I'm not saying they won't be professional. They could play with a lot of freedom and, when they play with a lot of freedom, they are a very dangerous side.

"But when Saracens arrive at Sixways, they will show absolutely no sentiment.

"They have a job to do themselves."

A win for the visitors will guarantee them a first Guinness Premiership semi-final and Harrison thinks they will have no shortage of motivation after going out of Europe six days ago.

But, while he thinks Saints start the day in the box seat, Harrison admits a lot can change over the course of the afternoon.

"A lot will depend on how the games start," he said. "It was Ian McGeechan who first said, you have got to put your body in the oven and your brain in the fridge' and that is what the challenge is for Worcester.

"They have got to be physically at their most rampant but they have got to make the right decisions."

Worcester have based their game around a strong set-piece but Harrison thinks they may have to show more dynamism if they are to overcome a side bristling with quality in every department.

"Worcester know what they do well and they do it very well," he said. "It's totally understandable that Worcester would want to go down this route but when we did the live game at Bristol a few weeks ago, there were some moments in that match when Worcester looked as dangerous running with the ball as any team in the Premiership.

"I think that has to be part of the Worcester game-plan this weekend. Saracens will want to play this sort of fast game and Worcester will have to be able to play an all-court match."

Sky Sports are broadcasting Warriors' game with Saracens, exclusively live and in high definition, at 2.45pm on Sky Sports 3.