After topping the league during the regular season and play-off pools, Warriors face a massive one-off game with Bedford Blues this Sunday to try and secure a final place.
And Arr insists Warriors are prepared for fully focussed for a big game where the stakes are so high.
"It is a game we have all been waiting for in the squad all season," said Arr. "It's a big one-off game and the feeling inside the camp is one of excitement, that we have now reached the massive games at the business end of the season that really matter.
"We always wanted to win our play-off pool and not lose at that stage - which we did - and now the focus is firmly on the semi-final.
"Home advantage is crucial at this stage and I hope as many fans as possible turn up and make plenty of noise.
"It's massively important that our fans are behind us in great numbers as the Worcester crowd have seen that, home and away, when they turn up and support us we do the same and really produce.
"They have stayed with us for years now and at some of the long away trips they turn out in huge numbers which always gives us a huge lift. At home it should be even better so I hope they really make their voices heard on Sunday."
Tickets remain on sale to watch Jonny Arr and the Warriors in crunch semi-final action this Sunday at Sixways. Call the Warriors Box Office on 01905 454183 or click HERE to buy online.