Get involvedpublished at 14:35 British Summer Time 14 April 2015
We've been asking which sporting legend you would want back at their peak and why?
Let us know via Twitter using #bbcsportsday and via the BBC Sport Facebook page., external Here are some of your replies...
John Hunter:, external Definitely Senna and Prost in their prime in modern F1 would be electric!!
Vaughan Try:, external Bring back Sir Geoff Boycott to show the boys how to block. Would love to see how he plays Mitchell Johnson & Mitchell Starc too.
Joeypine:, external As a blue, Georgi Kinkladze. Often discussed in the same breath as Silva. Would've loved to have witnessed him in the flesh.