Angelique Kerber takes the top spot back while Kristina Mladenovic and Anastasija Sevastova hit career highs in this week's WTA Rankings.

The first Premier Mandatory event of the European clay season was completed in Madrid last week and the big points on offer have enabled the Mutua Madrid Open's best performers to hit significant milestones on the WTA Rankings.

Champion Simona Halep has bounced back up four spots to World No.4, while finalist Kristina Mladenovic has continued her surge into the Top 20, rising three spots to hit another career high at No.14. Meanwhile, despite being forced to retire to Eugenie Bouchard in the third round, Angelique Kerber gained enough points to retake the No.1 spot from Serena Williams, out of action due to pregnancy. This week will mark her 23rd at the summit of the rankings.

Here are the other most notable WTA Rankings movers this week:

Caroline Wozniacki (+1, 11 to 10): The Danish former World No.1 has put together a very consistent season so far, notching up finals in Doha, Dubai and Miami along with four further quarterfinals. Her reward has been to re-enter the Top 10 for the first time since September 2015.

Anastasija Sevastova (+4, 22 to 18): The past two years have seen the Latvian, who retired following chronic injury and illness problems in 2013, quietly put together one of the most underrated comeback stories in the sport. Two-and-a-half years since she started again from scratch, with neither a protected ranking nor wildcards to aid her, Sevastova has broken the Top 20 for the first time following a semifinal run in Madrid. She becomes the first Latvian woman to reach the Top 20 since Larisa Neiland, who hit a career high of No.13 back in 1988.

Lauren Davis (+6, 33 to 27): Last March, the 23-year-old American fell out of the Top 100. But the past 10 months have seen her rebound spectacularly, reaching finals in Nanchang and Québec last year and winning her first title in Auckland in January. Quarterfinals in Doha, Dubai and Rabat, plus a fourth round showing in Indian Wells, have enabled her to break the Top 30 for the first time.

Eugenie Bouchard (+8, 60 to 52): The Canadian former World No.5 is still a long way off her career high - but she scored a brace of huge, high-profile wins over Maria Sharapova and Angelique Kerber en route to the Madrid quarterfinals, and her ranking is heading in the right direction again as a result.

Océane Dodin (+8, 63 to 55) and Wang Qiang (+7, 64 to 57): Dodin and Wang were the best-performing qualifiers in Madrid, both reaching the third round. The 20-year-old Dodin, who caused a shock in besting No.4 seed Dominika Cibulkova, hits a new career high, while 25-year-old Wang sits one spot behind her best ranking, set last month.

Sorana Cirstea (+16, 83 to 67): The Romanian was a surprise quarterfinalist as a wildcard in Madrid last year - a result that propelled her back into the Top 100. This year, again a wildcard entrant, she repeated the feat, including a first-round win over No.13 seed Anastasia Pavlyuchenkova.

Beatriz Haddad Maia (+15, 115 to 100): The 20-year-old Brazilian showed her early promise two years ago when she reached the quarterfinals of Rio de Janeiro and held three match points over top-seeded Sara Errani. Two weeks ago, she reached the Prague quarterfinals as a qualifier and last week's victory at the Cagnes-sur-Mer $100,000 ITF tournament - her fourth ITF title since November - has enabled her to become the eighth player this year to break the Top 100.