According to reports, 53-year-old Mike Tyson is set to come out of retirement to fight against Tyson Fury in a spectacular exhibition match. The American star certainly won’t be the first sports star to be drawn back into competing, and probably won’t be the last! Some did it because they were bored, others because they missed the competition, others, well, because they missed the money! We’ve taken a look back at some of the greatest athletes who have unretired and made comebacks to sport.