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