You need to play at least 500 ranked rounds as Legend to to saturate & be eligible for Tour Legend.
When your average score is equal or smaller than 60 you go from Legend to Tour Legend.
You need to play at least 200 ranked rounds as Tour Legend to to saturate & be eligible for Champion .
When your average score is equal or smaller than 59 you go from Tour Legend to Champion .
You need to play another 200 ranked rounds as a Champion to saturate .
You need to jump through 10,000 hoops before you receive an exclusive personal invitation before reaching Tour Champion.
May the SUN always be with you