Kerber is the second German player, after the great Steffi Graf to top the WTA rankings and only the third left-handed player (Martina Navratilova and Monica Seles) to do so. She ended Serena's streak of consecutive weeks at #1 at 186, which is exactly the same record number of weeks Graf had achieved.
Of the 24 people who have held the WTA ranking, Kerber, 28, becomes the oldest player to debut at #1. The record for most weeks at #1 is still held by Graf with 377, second is Navratilova with 332 and Wiilliams is 3rd with 306. I am fairly sure Serena can surpass Navratilova's record, but can she get past Steffi's? Time will tell.