(CNN) -- Tournament favorite Andy Murray has been seeded only fourth for the men's singles at the Australian Open in Melbourne next week.
Andy Murray is only seeded fourth for the Australian Open despite his unbeaten record this year.
Murray is unbeaten so far in 2009, prompting bookmakers to make him the man to beat in the first Grand Slam tournament of the year, which begins on Monday.
With the seedings following the respective ATP and WTA Tour rankings for men and women, world number one Rafael Nadal has been named top seed for an event he has never won.
It is the first time in four years that world number two Roger Federer has not been on top of the draw. Federer, the three-time champion, is seeded second with holder Novak Djokovic seeded three.
Murray, who is trying to become the first British man to win a Grand Slam singles title since Fred Perry back in 1936, has won all of his eight matches so far in 2009, including beating Nadal once and Federer twice.
He has beaten Federer five times in their seven career meetings -- his only defeats coming in their first meeting at Bangkok in 2005 and in the U.S. Open final last year
Serbian world number one Jelena Jankovic is the top seed in the women's draw, with American Serena Williams seeded second.
Jankovic, who withdrew from a team exhibition event in Hong Kong last week due to illness, leads three-times champion Williams despite having never won a Grand Slam event.
Dinara Safina, Elena Dementieva, Ana Ivanovic, Venus Williams, Vera Zvonareva and Svetlana Kuznetsova complete the top eight.
Defending champion Maria Sharapova's withdrawal because of ongoing shoulder problems has allowed the rest of the field to move up, meaning world number 11 Nadia Petrova moves into the top 10.
World number 20 Katarina Srebotnik of Slovenia will miss the tournament because of an Achilles injury and world number 29 Li Na of China has been forced out with a knee injury.