High-flying India crashed to a stunning 2-3 defeat against Australia at home in the bilateral ODI series and the setback should act as a warning sign for Virat Kohli and his men going into the upcoming World Cup as one of the favorites, feels former captain Rahul Dravid. India led 2-0 in the five-match series, but lost the last three to the reigning World Cup champions to lose an ODI series after a lengthy gap. These games are the last of the 50-over competition for India going into the World Cup commencing on May 30 in England. "I think there was a bit of notion that we are going to walk there and win the World Cup easily. So it's a good thing that has happened. What it has (the outcome against Australia) reminded us is that we have to play the World Cup very, very well," said Dravid.