"India plays good one-day cricket. So, I wouldn't like to put a finger on who is favourite to win the 5 October final. You've got to look after your own backyard and not worry about what other teams are doing," Butler said in an ICC newsletter.
"Yuvraj Singh is a massive danger, especially with some of the short boundaries he can get," the 27-year-old pacer added.
Apart from Yuvraj, the right-arm pacer tipped South African pacer Dale Steyn and Pakistan's Saeed Ajmal as players to watch out for.