Melbourne: The world`s top-ranked doubles pair, Bob and Mike Bryan, suffered their earliest Australian Open exit in more than a decade on Monday when they lost 7-6(9) 6-4 to American Eric Butorac and South Africa`s Raven Klaasen in the third round.

The American twins, who have won the title six times, led 4-0 in the first-set tiebreak before being overhauled and were then broken once in the second set.

"It`s frustrating, we like coming down here and starting the year hot," Mike Bryan told reporters.