AAP

Melbourne Storm have extended the contracts of NRL speed merchants Justin O'Neill and Sisa Waqa.

O'Neill, who has worked his way through Melbourne Storm's development pathways and made his NRL All Stars debut this year, has signed on for a further three years.

Fijian Waqa joined the Storm in 2011 and has been rewarded with a two-year extension.

"Both Justin and Sisa are very important for Melbourne Storm and we are delighted to secure their signatures," said Melbourne's general manager of football Frank Ponissi.

"One of Justin's greatest assets is his speed, something everyone craves in rugby league.

"We believe Justin is just starting to reach his potential with exciting times ahead.

"Sisa has fast become one of the most popular figures at our club. He has worked extremely hard on all parts of his game; especially his work under the high ball."

The pair will be Melbourne's starting wingers in Sunday's clash with Newcastle at AAMI Park.

While his players performed across the park in the last-start win over Cronulla, coach Craig Bellamy said they needed to maintain that standard with plenty of others looking for an opportunity.

"If you can keep the same side continuously that helps with continuity in your play," Bellamy said.

"That's a great help but having said that, the players need to make sure that they perform well themselves because a lot of our other players are playing really well in our feeder teams.

"They're knocking really hard on the door and sometimes you've got to give them a reward as well."

Centre Junior Sa'u scored four tries in their Queensland Cup side last round while Siosaia Vave, Ben Hampton and Brett Finch are also pushing for selection.

Some of those players are certainties for some game time following this clash with the Knights, with the Storm's State of Origin foursome then absent for two of their next three matches.

The Origin contingent have had the week off training and will return on Saturday to pick up on their gameplan ahead of the Sunday afternoon match.

Bellamy said the squad was still "buzzing" following their 38-6 thumping of the Sharks.