A Decimated Dapto Dandaloo squad are preparing for the worst on the injury front after a last-gasp Waratah Cup loss left coach Norm Boardman thin on numbers for the weekend's visit by Bulli.

The Fury had again threatened to pull off a giant-killing upset in the state knockout competition but succumbed to an extra-time winner from NSW National Premier League strugglers Marconi on Tuesday.

It's the potential loss of a host of stars which will cause Boardman the most headache in a mouth-watering Illawarra Premier League clash on Sunday.

The Fury were forced to replace Brad Welch, Shane Lyons and Shaun McRae (all injured) on Wednesday, while Wade Oostendorp was already ruled out of the Bulli clash.

It adds to lingering injury concerns over Joe Crowley and Todd Sparks.

Goalkeeper Mitch Blowes also skipped the Waratah Cup thriller due to injury.

"The injury toll is mounting but we'll go back and lick our wounds," Boardman said.

"We'll freshen [the fit players up] up for the Bulli challenge.

"You like to have tough challenges and no injuries, but we'll kick on from it and I'm sure every other club has got things to deal with.

"We've got a couple in youth grade who we can call up if we need to in the next few weeks to get us through."

Ryan Suttle's second-half equaliser against Marconi had the visitors dreaming of another upset which would have inched them closer to an FFA Cup berth.

Suttle's strike cancelled out a first-half stunner from Sean Conway from distance.

But Marconi avoided the lottery of penalties with a winner deep into injury time in the second half of extra time which was the last play in the game.

"Part of me thinks I would rather get beaten in extra time - not that I like getting beaten at all - but it's a little bit easier to accept you've got beaten by a goal rather than a penalty shoot-out," Boardman said.

"We came away with a lot of confidence out of that. Our fitness is good because we got 120 minutes under our belt; the only problem we have now is injuries."

The South Coast Wolves are the last Illawarra team in the Waratah Cup.

They play Sutherland in the round of 16.