Australia will be the big underdogs here, but are unlikely to play defensively to contain their opponents. They will most likely continue their style of fast & attacking football, which could open the game up completely considering Chile’s attacking approach. The match will likely involve lots of counter-attacking and running for both teams.
Chile have the much stronger team, with the Aussies lacking experience or quality at the same sort of level. I would expect Chile to use their pace and energy up front and convert chances. I would back Chile -1 handicap @5/4. I’d go for this over anything like Chile to win to nil, purely because it is possible that Australia will score. Its a World Cup in which they don’t really have much to lose and are fully expected not to make an impression in the group stage. Their opportunities may be limited, but I think they can still pose a threat, particularly from set pieces where Chile can be poor and the Aussies have Tim Cahill. Not only could Cahill pose a threat in the air from free-kicks/corners, but he would benefit from making late runs into the box and getting on the end of crosses as a result of counter attacks.
If he was fit, Vidal would probably be the key man, hovering around central midfield and attack. However, it looks like he will not play as a result of his lingering injury problems. The odds on goalscorers are pretty short, with not a huge amount of value considering its slightly difficult to know how Chile will set up without Vidal. Alexis Sanchez is around 4/1 to score first and Vargas 5/1 , neither of which seem worth it to me. Due to the potentially open nature of the game, and the attacking intent shown by both sides recently, I’ll probably go for 1st half over 1.5 goals @2/1.