Rovers took an early lead when Jason Roberts tucked away Brett Emerton's right-wing cross from close range.
Alex Brosque with a double, Harry Kewell and Brett Emerton scored for the Socceroos who top Group D.
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Hughes also said that Australian duo Brett Emerton and Lucas Neill have been offered new deals with the club.
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Vonk then punched away a Brett Emerton attempt as Australia pushed forward.
Volleys from Martin Olsson and Brett Emerton gave Rovers hope before Ashley Young curled home to wrap up the win for Martin O'Neill's side.
First the Paraguayan blazed over from 12 yards with Arsenal keeper Manuel Almunia stranded, and then he headed over a brilliant Brett Emerton cross.
Blackburn doubled their lead after 18 minutes, Roberts scrambling home from close range after Brett Emerton's cross rebounded into his path off Ryan Shawcross.
Rovers brought on David Dunn for Brett Emerton at the break and played slightly higher up the pitch in an attempt to support Kalinic.
Goals from David Dunn, Brett Emerton and Ryan Nelsen earned Rovers a victory which moved them up to eighth spot in the Premier League.
Hilario failed to deal with a deflected Brett Emerton cross and Benni McCarthy scored a penalty, but Paulo Ferreira levelled at 3-3 deep into extra-time.
It was 4-0 less than ten minutes later as Australia sprang the offside trap and substitute Robbie Kruse squared for Brett Emerton to tap into an empty net.
Holloway had been furious that Blackburn's injury-time winner by Brett Emerton was allowed to stand, despite a suspicion of offside and a foul during the build-up to the goal.
Blackpool were particularly angry when Brett Emerton's winner was allowed to stand despite a suspicion of offside and what Holloway felt was a foul on Gary Taylor-Fletcher in the build-up.
At the other end Bolton's defence were easily dealing with a succession of set-pieces but when Blackburn finally realised they should hit the ball deeper, Brett Emerton shot high and wide when the ball dropped to him.
In fairness, Australia had the odd half-chance, Jason Culina heading a Brett Emerton cross over and Richard Garcia sending a snap-shot past the post - while a second-half appeal for handball against Per Mertesacker in the box might have warranted closer inspection.
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