Steamers require 'brutal' defence to take down Waratahs at home

But they can't afford a repeat of the costly errors that saw them fall just short against Wagga Ag College last weekend.

"To beat Waratahs you've got to be clinical," Musarra said.

"The handful of opportunities you get, you've got to convert the tries.

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"But really we've got to be brutal in defence, because they're going to have a lot of possession.

"We've done a lot of work on our line speed and tackle execution.

"If our defence is up to the task, we'll push them and possibly come away with the points."

The Steamers are sweating on the availability of Ryan O'Sullivan, but will welcome Tom Harvey and Jacob O'Riain into the starting 15.

James Devlin and Tim Carroll will return in the coming weeks.