Which celebrated athlete announced that their last Olympic competition would be the 2016 Summer Olympics in Brazil?

Question

What were the grounds for the debate about whether Russian athletes would be allowed to participate in the 2016 Olympic Games?

Answer 1

Track athlete Usain Bolt
Bolt announced that his last international competition would be the 2017 World Athletics Championships. As at the end of the 2016 Olympics Bolt held, and continued to hold, the world record for the 100 metres and 200 metres sprints and as a part of the 4 × 100 metres relay.