Dominika Cibulkova: WTA ranking - 35. Country - Slovakia. Cibulkova has reached the quarterfinals for all major Grand Slam tournaments but has never won a title. During the Australian Open in 2014, Cibulkova became the first Slovak to enter a Grand Slam final

Caroline Wozniacki: WTA ranking - 2. Country - Denmark. Wozniacki is the first woman from a Scandinavian country to take the top spot in the WTA rankings. She went on to win her first ever Grand Slam when she clinched the Australian Open in 2018

Serena Williams: WTA ranking - 16. Country - United States. Serena Williams has the most Grand Slam titles in singles, doubles and mixed doubles categories. She has a total of 39 Grand Slam titles. Serena Williams has won 7 Australian Open, 3 French Open, 7 Wimbledon and 6 US Open titles

Garbine Muguruza: WTA ranking - 14. Country - Spain. Muguruza went on to shock the world when she beat Serena Williams to win the 2016 French Open. A year later she also won Wimbledon

Victoria Azarenka: WTA ranking - 63. Country - Belarus. Azarenka has won the Australian Open on 2 occasions and has reached the finals of the US Open. She is also the only Belarusian tennis player to win a Grand Slam title

Eugenie Bouchard: WTA ranking - 115. (none). Country - Canada. The Canadian beauty has made it to the Wimbledon final in 2014 but lost to Petra Kvitova. Bouchard has also made it to the Australian Open and French Open finals

Karolina Pliskova: WTA ranking - 8. Country - Czech Republic. Pliskova has not won herself a Grand Slam title but has made it to the Australian Open quarterfinals on two occasions as well as the US Open final

Petra Kvitova: WTA ranking - 5. Country - Czech Republic. Petra Kvitova has won Wimbledon twice. She has a total of 23 career singles titles. She is also a bronze medallist at the 2016 Rio Olympics

Kristina Mladenovic: WTA ranking - 47. Country - France. Kristina has one singles title to her name but has won 17 doubles titles.Kristina Mladenovic has won the Wimbledon and Australian Open in mixed doubles

Sara Errani: WTA ranking - 77. Country - Italy. Sara Errani has reached the French Open final in 2013 but is yet to win a Grand Slam singles title. However, in doubles, Sara Errani has won 5 Grand Slams - Australian Open twice while Wimbledon, US Open and French Open once

Madison Keys: WTA ranking - 18. Country - United States. The tennis star became the first woman from the United States to enter the top 10 rankings after Serena Williams. Madison Keys has reached the US Open final

Coco Vandeweghe: WTA ranking - 49. Country - United States. The tennis star has 3 WTA titles to her name but has yet to clinch a Grand Slam title. In mixed doubles, she has reached the Australian Open and US Open finals

Belinda Bencic: WTA ranking - 39. Country -Switzerland. Bencic won the Aegon International tournament when she defeated Agnieszka Radwanska but her biggest achievement is winning the Rogers Cup

Roberta Vinci: WTA ranking - 133. Country - Italy. Vinci is the fourth Italian female to enter the WTA top 10 rankings as well as the oldest woman to enter the top 10 rankings. Roberta Vinci reached the US Open final in 2015. She has won the doubles title for all 4 Grand Slams - twice for Australian Open