1 / 10
FRANCESCO TOTTI: The Italian legend suffered another injury, his wife suggesting his career is up.
2 / 10
USAIN BOLT: The Jamaican star has discussed retirement after Rio 2016.
3 / 10
MANNY PACQUIAO: He will fight for one last time against Tim Bradley.
4 / 10
KOBE BRYANT: Considered the greatest of all time, Kobe will retire at the end of the season.
5 / 10
MATT GITEAU: His Toulon contract is up at the end of this year.
6 / 10
STEVEN GERRARD: Not confirmed, but the Liverpool legend is likely to retire.
7 / 10
CHARLES WOODSON: The only player in the NFL to have at least 50 interceptions.
8 / 10
DAVID ORTIZ: The Boston star will hang up his bat at the end of this season.
9 / 10
JESSICA ENNIS-HILL: GB's darling of athletics is contemplating calling it quits after Rio.
10 / 10
BRYAN HABANA: The celebrated winger is still deciding how much rugby is left in him.