Complex sentence: Following his good performances in Unión Española, Gutiérrez was selected for the youth Chile national football team, participating at the pre-Olympic Tournament 2000 in Londrina, Brazil, where he helped Chile qualify for the Olympic Games in Sydney in the same year.
Split into simpler sentences: Following his good performances in Unión Española, Gutiérrez was selected for the youth Chile national football team. He played with the squad in the pre-Olympic Tournament 2000 in Londrina, Brazil, where he helped Chile qualify for the Olympic Games in Sydney in the same year.