Complex sentence: He represented FR Yugoslavia at the 2000 Summer Olympics in Sydney, Australia, where he lost in the first round of the Men's Welterweight (-- 67 kg) competition to Thailand's veteran Jangphonak Parkpoom due to a controversial 9-9 point decision.
Split into simpler sentences: He represented FR Yugoslavia at the 2000 Summer Olympics in Sydney, Australia. There he lost in the first round of the Men's Welterweight (-- 67 kg) competition to Thailand's veteran Jangphonak Parkpoom due to a controversial 9-9 point decision.