Australia and England will lock horns in the opening match of the ODI cricket tri-series in Sydney tomorrow. Reigning World Cup title holders, India, will begin their campaign against Australia in Melbourne on Sunday. Australia will be without their inspirational skipper Michael Clarke in the tri-series as he is still recovering from a hamstring surgery. In Clarke's absence, Twenty20 captain George Bailey will lead the side with Steve Clarke as his deputy. The tri-series is seen as a final warm-up for all the three teams ahead of the World Cup, to be co-hosted by Australia and New Zealand in less than a month's time.