Both hosts West Indies and reigning champions Australia won all three of their matches in the group stage.
West Indies made one change from their eight-wicket win over Ireland at Sabina Park on Friday with Corey Collymore's extra pace seeing him come in for Ian Bradshaw.
Australia were unchanged from the side that defeated South Africa by 83 runs at Warner Park on Saturday.
This was the first match played at this ground, built specially for the World Cup.
Conditions were overcast following early morning rain with the pitch an unknown quantity. But the cloudy skies may have prompted Lara to bowl first with temperatures still humid.
West Indies: Chris Gayle, Shivnarine Chanderpaul, Ramnaresh Sarwan, Marlon Samuels, Brian Lara (capt), Dwayne Bravo, Dwayne Smith, Dinesh Ramdin (wk), Daren Powell, Jerome Taylor, Corey Collymore
Australia: Adam Gilchrist (wk), Matthew Hayden, Ricky Ponting (capt), Michael Clarke, Andrew Symonds, Michael Hussey, Shane Watson, Brad Hogg, Nathan Bracken, Shaun Tait, Glenn McGrath
Umpires: Aleem Dar (PAK) and Asad Rauf (PAK); 3rd umpire Billy Bowden (NZL); reserve umpire: Rudi Koertzen (RSA)
Match referee: Chris Broad (ENG)
Weather: 27 degrees Celsius (81 Fahrenheit); chance of thundery showers.