Most consecutive weeks as tennis world No.1 (female)

Serena Williams (USA) drew level with Steffi Graf (Germany) for the most consecutive weeks as world No.1 (female) by recording an unbroken run of 186 weeks at the top – a streak that began on 18 February 2013 and ended on 5 September 2016. Graf racked up 186 weeks in a row between 17 August 1987 and 4 March 1991.

Up to and including her final week as world No.1 (w/c 5 September 2016), Williams had amassed a total of 309 weeks at the top of the rankings – in six different stints. She's currently third in the list of female players with the most weeks at No.1 overall, behind Martina Navratilova (332 weeks in 1978–87) and Steffi Graf (377 weeks in 1987–97).

After Graf and Williams, the next best runs of consecutive weeks at No.1 are: 156 weeks – Martina Navratilova (1982–85); 113 weeks – Chris Evert (1976–78).