Complex sentence: In 1981, one year after his professional debut, Francescoli joined the Uruguayan team that won the South American Under-20 Football Championship; he was voted among the best of the world that year.
Split into simpler sentences: In 1981, one year after the professional debut, he joined the Uruguayan team that won the South American Football Championship Sub- 20. It was voted among the best of the world that year.