The Victory currently sits second on the table on equal points but behind on goal difference to Adelaide United and a win could see them take out the minor premiership as the Reds have to face Central Coast Mariners away who are themselves playing for a spot in the final four.
Merrick says that being brazen and trying to score as many goals as possible is the wrong way to play the game.
"This idea that's the pressure is on us to score lots of goals, we can't go out with that mindset," Merrick said.
"We'll go out to play our normal home game-type football which is high intensity, inter-passing, trying to achieve lots of shooting opportunities. If we play the way we normally play, everything else should fall into place.
"It's really a case of trying to keep a clean sheet again. Try to score one, and then try to score another one, play that brand of football, rather than worry about the permutations."
Knowing that Wellington also need to win to finish in the four was also comforting for Merrick.
"They are not going to camp in front of their penalty box. I would think they'll play as they did against Adelaide they'll play attacking football," he said. "Wellington, being a team that has to win, have got to be an attacking team and I think that suits us."
The Victory has a full roster to choose from now Matthew Kemp returns from suspension whilst the Phoenix regains captain Andrew Durante from injury but will lose stand-in skipper Tim Brown who will miss due to suspension.