5 oldest tennis players to be ranked number 1 in the world

#2 Serena Williams

Serena Williams

The younger of the 2 Williams sisters, Serena became World No. 1 in February 2013 at the age of 31 years,4 months and 24 days. This was the sixth time in her career that the American had ascended to the number 1 position in the world.

Out of all the instances, however, the sixth time held a larger significance as with that she displaced fellow American Chris Evert as the oldest player to be ranked number 1 in the world.

Now aged 33 years and 30 days, Williams still holds the No. 1 ranking and will end 2014 as the numero uno WTA player.