India defeated Australia by five wickets to enter the semi-finals of the World Cup in Ahmedabad today.Earlier, Australian skipper Ricky Ponting won the toss and elected to bat. Australian had a very cautious start after losing their opener Shane Watson cheaply.But Captain Ricky Ponting marked his return to form with a scintillating century as Australia posted a competitive 260 for six in stipulated 50 overs.Ponting notched up his 30th ODI century and his 5th in the World Cup to silence his detractors.The winner of today's match will play Pakistan in the second semi-final match, slated for 30th of March in Mohali.Brief Scores:Australia: 260 for six in 50 overs (Ricky Ponting 104, Brad Haddin 53, David Hussey 38 not out; Yuvraj Singh 2/44, Zaheer Khan 2/53, Ravichandran Ashwin 2/52).India: 261 for five in 47.4 overs (Yuvraj Singh 57 not out, Sachin Tendulkar 53, Gautam Gambhir 50, Suresh Raina 34 not out; David Hussey 1/19).Yuvraj Singh was declaired the man of the match.