Blake finished fourth and called Bolt "an icon and true warrior of the sport".
There was a time when Blake was considered one of the few sprinters who could dethrone Bolt and he took the silver in London four years ago.
He said injures have slowed him, but insisted "I'm not dead" and he'll be back.
He praised Bolt for his long reign.
When asked if Bolt is bigger in Jamaica than Bob Marley, Blake said "he's getting there".
Bolt won a third-straight 100m Olympic gold in a time of 9.81.