Invincible

Arsenal achieved what many thought impossible in 2003/04, by playing an entire English Premier League unbeaten.

In the history of any sport, no one dominated quite like Sir Donald Bradman.

Jamaica's Usain Bolt burst onto the Olympic scene in 2008 and owned the track, with an astonishing haul of three gold medals and three world records.

Floyd Mayweather fought 50 times for 50 wins in one of boxing most colourful careers.

Team USA's Olympic women's basketball team has an unbeaten run to rival any in sport.