Rebels, who are 17 league matches unbeaten, sit sixth but have games in hand on every side above them, apart from Kingstonian, whom they beat 3-1 away in November.
After draws in their last two games, and in three of their last four matches, Rebels joint manager Alan Pook is calling for his players to step up to the plate for the crucial clash. He said: "We will be going all guns blazing on Saturday for a a match I am really looking forward to.
"It should be a great game, although we know it will be very tough.
They are playing very well at the moment and are the best team in the league, but on our day we can match them as one of the best two teams in the league.
"In our last five or six games, we haven't been at our best, but we have managed to soldier on and remain unbeaten. All sides have a sticky patch and we have been off the boil recently.
"We need to be on our game on Saturday and I need the players to start the game right, not just turn it on in the last half-an-hour.
"With our young side we are sometimes a little nave beginning games, which is something we will be working hard on in training this week to stamp out."
The match seems a must-win for Worthing if they are to pose a threat to winning the league but Pook believes that every other game is, and has been, just as important.
He said: "We put in a great performance away at Kingstonian and then we have lost points against average teams at home.
"These could have been games that should have been must-win. It's more to say that Saturday is a mustn't lose but, of course, we'll be going flat out for the victory."
Pook has also called for the "fantastic" Rebels support to continue. He added: "The supporters are excellent at the moment. When we haven't been playing our best, they are getting right behind the team.
"They played a big part in Saturday's result against Chipstead, by encouraging and picking up the players and giving them some belief.
"We need more of this on Saturday. If the home crowd can get behind us it will give us a big lift."
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