Complex sentence: Only 32 players/pair will be played in the main round, as oppose to the 64 players/pair and at least in the past tournaments, among the 32 players/pair, only 8 players/pair will be seeded in each category.
Split into simpler sentences: Only 32 players/pair will be played in the main round, as oppose to the minimum 64 players/pair in the past tournaments. Among the 32 players/pair, only 8 players/pair will be seeded in each category.