Complex sentence: The five quarterfinal champions, plus the four highest-scoring non-winners in the tournament, advance to the semifinals, where the three winners of the three semifinal games advance to the finals and compete for the championship in a two game final.
Split into simpler sentences: The five quarterfinal champions, plus the four highest-scoring non-winners in the tournament, advance to the semifinals. In the semifinals, the three winners of the three semifinal games advance to the finals and compete for the championship in a two game final.