What have been the most tragic farewells in sports history?
Legendary Australian batsman Donald Bradman got out on zero in his last innings and failed to achieve an average of 100 in Tests. Ballon d'Or 1998 winner Zinedine Zidane headbutted an Italian player and got sent off in the 2006 World Cup final. Eight-time Olympic gold winner sprinter Usain Bolt failed to complete the final race of his career.