The most-watched Premier League game in British history between Liverpool and Manchester United was actually un-watchable for hundreds of thousands of viewers, who are colour blind.
Almost five million football fans tuned in, but an estimated 300,000 of them struggled to tell one team from the other.
Supporters who experience 'colour vision deficiency' were horrified to discover United had chosen to wear their away strip for the match at Anfield, which is 'earth green', while Liverpool wore their traditional red kit.
The 'earth green' of United's away strip is a similar shade to Liverpool's red kit
Green and red, particularly in darker shades, are indistinguishable for many colour-blind people, who gave up on the contest long before the end because they simply could not see who was who, resulting in hundreds of complaints.