Here are examples for several ways to determine seeded knockout features: Any other restrictions like (e.g competitor from the same state\league can't be drawn together).Re-seeding - Is there a Re-seeding after every round? e.g on NFL and NHL a Re-seeding occurs so the highest winning seed will be drawn against the lowest winning seed, the second-highest will meet the second-lowest, etc.Olympic Judo when a competitor loses on advanced rounds he gets second change throw consolation stage where he can still win bronze medal, It also exist in tournament that the third place is decided in a match between the semi-final losers.
This is in opposed to FA cup or UEFA championship league qualifications round where higher ranked competitor will play less than others (referred to as bye). On Tennis tournament every player will play the same number of games at every stage. Equality of tournament - If want all winning competitors to play the same number of matches at any stage.
There are few ways to do this, it depends in the number of variants.