NOTTINGHAM: Australia extended their 100 percent start to their World Cup title defence with a 15-run win against the West Indies at Trent Bridge on Thursday.Nathan Coulter-Nile (92) hammered the best World Cup score by a number eight as Australia recovered from 38 for four to post 288 all out.Pace bowler Mitchell Starc took five wickets as Australia survived a tense run-chase, featuring 68 from Shai Hope, to restrict the West Indies to 273 for nine and make it two successive victories.Chasing 289, West Indies were restricted by Australia to 273 for nine wickets in 50 overs–the news