They'll look to continue to build upon that as they battle Australia, who lost a 2-1 decision to group favorite France on Saturday.
He enjoyed a short cameo off the bench against France and is likely to be involved as an impact substitute again with the Socceroos face Denmark and Peru, with a host of European clubs likely to be keeping tabs on him.
Pointing to the 193cm forward Yussuf Poulsen, who scored the victor in Denmark's first game against Peru, Tomasson said "look at this guy, he's also an animal, we are strong, we are strong as well".
"I also read all the Dutch newspapers and I think they have been working defensively the last couple of weeks, " he said.
"Everyone knows what is at stake, no one is kidding themselves. we have got to get a result".
During the Socceroos 2-1 loss in their opening group game against France at the 2018 World Cup in Russia, Australia produced one of country's finest defensive displays at a finals tournament.
"Maybe we need to attack a little bit more but it just depends on the way the game's going ... hopefully we can create chances and put them away".
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"I know the boys are still running on a high at the moment and I don't think that's going to change until the last game against Peru".
"They played with their quality and they never give up".
Tottenham playmaker Eriksen had a quiet outing against the South Americans but still made a decisive intervention, threading the pass that set up Yussuf Poulsen's goal.
France struggled to break down the Australian defence for long periods of the contest, with their attacking talents Antoine Griezmann, Ousmane Dembele and Kylian Mbappe nullified by the sturdy Socceroos.
"It was the same against France and the coaching staff will have us well prepared and if we need any information on any of the players they'll provide it for us". "They've got players playing in top leagues around the world", he added.
"Just because he has got a pair of gloves on doesn't mean he can stop every goal", Sainsbury said.