Teenage archery star David Barnes is hoping he got all his bad shots out of his system as world records tumbled on the eve of Olympic competition.

Ranked No.4 in the world, Barnes had a shaky start to his Olympic campaign, finishing in 39th position in the ranking rounds with a 72-arrow score of 641.

Korean-born Australian coach Ki Sik Lee has tipped Barnes as a strong contender for gold but it's teammate Simon Fairweather who is seeking to defend his Olympic title.

Back from retirement, Fairweather, the world No.53 ranked 20th in the Olympic shoot off with a total 658 points, while recently-crowned junior world champion Tim Cuddihy, 16, was best Aussie on the day and goes into the head-to-head elimination competition ranked 12th.

Combined, the team which has won two titles in recent pre-Olympic meets ranked seventh with 1952 points.

The ranking results came as the Koreans smashed three world records.

They won three of the four gold archery medals on offer in Sydney and are again in devastating form in Athens.

Dong-hyun Im shot a record 687 putting him in first position going into Monday's elimination matches.

Compatriot Park Sung-hyun, 21, set an individual world record of 682 points, breaking the 72-arrow mark of 679, set in May by Italian Natalia Valeeva.

The women's team of Park, Lee Sung-jin and Yun Mi-jin also set a world record of 2,030 for the 216-arrow ranking round.

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