Match ends, Chile 3, Australia 1.
Alexis Sanchez scored one and made another as Chile started their World Cup campaign with a win over Australia.
Barcelona forward Sanchez finished from close range in the 12th minute and then set up Jorge Valdivia to drive in from outside the area two minutes later.
Former Everton midfielder Tim Cahill pulled one back with a header from Ivan Franjic's cross before half-time.
After an anxious second half, Wigan's Jean Beausejour's long-range effort added Chile's third in added time.
Tipped by many as having a strong chance of progressing from Group B, Chile will have been buoyed by the Netherlands' 5-1 win over Spain, who they face on Wednesday.
They looked likely to have the luxury of focusing on building a big cushion of goal difference ahead of their meeting with Vicente Del Bosque's world champions when they moved two ahead inside 14 minutes.
But, up against Chile defenders Gary Medel, used in midfield by Cardiff, and Gonzalo Jara, who has just been released by Nottingham Forest, Cahill's threat in the air helped stubborn Australia back into the contest.
Chile's attack only justified its strong reputation in flashes and they looked far from secure at the back but they have a chance to take a big step towards the second round when they face Spain.
They took the lead when Charles Aranguiz managed to get in behind the Socceroos defence for the first time after 11 minutes, and when Eduardo Vargas headed down from the midfielder's cross, Sanchez guided in at the near post.
The advantage was doubled when Barcelona forward Sanchez picked out Valdivia and the Palmeiras midfielder hit a dipping shot in off the underside of the bar from 25 yards.
Starting just five weeks after knee surgery, midfielder Arturo Vidal drove wide after another incisive move.
But a slackness crept into their play and Cahill, renowned for his aerial ability in his time at Everton, rose above Medel to thump in from a Franjic cross.
The 34-year-old New York Red Bulls player was then denied by a low save from Bravo after he was found by Mathew Leckie on the edge of the area.
After the break, Cahill had an effort ruled out for offside before Tommy Oar's cross was met with a firm half-volley from Bresciano only for Bravo to push around the post.
Chile came close to a third when Sanchez threaded through for Vargas and the Valencia forward's poked effort was hacked off the line by Alex Wilkinson.
Cahill headed over from another Jason Davidson cross as Australia continued to threaten.
But after Mauricio Panilla's shot was saved by Matthew Ryan, fellow substitute Beausejour found the corner with the rebound.
Chile coach Jorge Sampaoli:
"We had a good understanding in attack, especially with Alexis Sanchez as the focal point, and we created several chances. After Australia scored we lost a little bit of momentum and we got frustrated.
"We didn't play as well as we can - and with the calibre of our next two opponents, we will have to give a more complete performance. The prospect of playing Spain at the Maracana is electrifying."
Australia midfielder Tim Cahill:
"They got in twice and punished us but after that you could see their legs were going and we knew we could get something from this game.
"We really stood up strong. Not a lot went our way and it showed.
"It's all about defining moments. This is the stage to do it and when you're called upon you have to show up. We showed a bit of fear but we got in their faces. We showed some aggression, we'll learn from this and go into the next game positive."
- 20AránguizBooked at 86mins
- 8VidalSubstituted forGutiérrezat 60'minutes
- 10ValdiviaSubstituted forBeausejourat 68'minutes
- 11VargasSubstituted forPinillaat 88'minutes
- 2FranjicSubstituted forMcGowanat 49'minutes
- 15JedinakBooked at 58mins
- 5MilliganBooked at 67mins
- 23BrescianoSubstituted forTroisiat 78'minutes
- 11OarSubstituted forHalloranat 69'minutes
- 4CahillBooked at 44mins
- Noumandiez Doue
- Shots on Target
Second Half ends, Chile 3, Australia 1.
Goal! Chile 3, Australia 1. Jean Beausejour (Chile) left footed shot from outside the box to the bottom right corner.
Attempt saved. Mauricio Pinilla (Chile) right footed shot from the centre of the box is saved in the centre of the goal. Assisted by Charles Aránguiz.
Substitution, Chile. Mauricio Pinilla replaces Eduardo Vargas.
Attempt blocked. Mathew Leckie (Australia) right footed shot from the left side of the box is blocked. Assisted by James Troisi.
Charles Aránguiz (Chile) is shown the yellow card for a bad foul.
Foul by Charles Aránguiz (Chile).
Ben Halloran (Australia) wins a free kick in the defensive half.
Attempt missed. Alexis Sánchez (Chile) right footed shot from outside the box is too high. Assisted by Jean Beausejour.
Attempt blocked. Mark Milligan (Australia) right footed shot from outside the box is blocked. Assisted by Matthew Spiranovic.
Felipe Gutierrez (Chile) wins a free kick in the defensive half.
Foul by James Troisi (Australia).
Alexis Sánchez (Chile) wins a free kick in the defensive half.
Foul by Jason Davidson (Australia).
Substitution, Australia. James Troisi replaces Mark Bresciano.
Marcelo Díaz (Chile) wins a free kick in the defensive half.
Foul by Mark Bresciano (Australia).
Offside, Chile. Alexis Sánchez tries a through ball, but Eduardo Vargas is caught offside.
Foul by Gary Medel (Chile).