James Harden ( Basketball)
Harden had to withdraw from joining team USA due to hamstring injury.
Sun Yang (Swimming)
Three-time Olympic gold medalist won't compete due to his eight-year ban.
Mo Farah( Long-distance running)
Four-time Olympic champion will not compete at Tokyo Olympics as he missed out on the qualification time.
Om Yun-chol( Weightlifting)
The five-time world champion will miss out on the games, because of North Korea's withdrawal.
LeBron James (Basketball)
The Olympic legend was left out of the Team USA. The NBA star has been suffering with an ankle injury.
Rafael Nadal( Tennis)
Tennis legend decided to not compete this year listening to his body which needs rest.
Lin Dan( Badminton)
Badminton legend said farewell to his 20-year career due to the condition of his body after injuries.
Carolina Marin( Badminton)
Reigning women's singles gold medalist won't defend her title because of injury in the knee.
Dustin Johnson( Golf)
World Number two won't compete due to close dates between the Olympics and World Golf Championships.
Serena Williams ( Tennis)
Four-time Olympic gold medalist won't be competing in Tokyo due to a lot of reasons.