Tokyo will be 33-year-old Fraser-Pryce's fourth and final Olympics.

But I don't get over-confident, said Bolt, who has said this will be his final Olympics.

This will be her final Olympics.

Baynes, however, will be 33 years of age, giving him hope to make an impact in his final Olympics.

- Canadian Patrick Chan after his free skate in his third and final Olympics.

Hirscher had previously said that Pyeongchang would be his final Olympics but appeared to be reconsidering his position on Thursday.

Could be her final Olympics and in a career of great highs and horrible lows, watch in awe as Meares writes possibly, her final chapter.

Park is also due to swim in the 100m, 200m and 1,500m freestyle races in what will be his fourth and final Olympics.