The Melbourne Storm are adamant they won't be sucked in by retiring Sharks star Michael Ennis' niggling tactics in Sunday's NRL Grand Final.

The NRL is enjoying a more low-key buildup to the Grand Final weekend before the Cronulla Sharks take on the Melbourne Storm at ANZ stadium.

Storm coach Craig Bellamy didn't believe winger Suliasi Vunivalu was going to play first-grade this season but has praised the Fijian flyer for his work ethic and humble attitude towards the game.

Storm halfback Cooper Cronk says while winning the Dally M Medal is humbling his focus has turned right back to his club's Grand Final preparations against the Sharks.

Melbourne Storm insists they won't fall victim to the renowned tactics of Cronulla veteran Michael Ennis in Sunday's Grand Final at ANZ Stadium.