Complex sentence: He represented his native country at the 2000 Summer Olympics in Sydney, Australia, where he lost in the first round of the men's bantamweight division (-- 54 kg) to Georgia's Theimuraz Khurtsilava.
Split into simpler sentences: He represented his native country at the 2000 Summer Olympics in Sydney, Australia in the men's bantamweight (54 kg) division. He lost in the first round to Georgia's Theimuraz Khurtsilava.