Sharapova has qualified but may be forced out due to injury. (Ronald Martinez/Getty Images)
Maria Sharapova, Agnieszka Radwanksa, Sara Errani and Roberta Vinci have all qualified for this year's TEB BNP Paribas WTA Championships in Istanbul.
The WTA Championships in Istanbul are just a week away and a number of players have achieved qualification recently. Serena Williams and Victoria Azarenka made the cut earlier in the year, but it's now confirmed that Maria Sharapova, Agnieszka Radwanska, and the doubles team of Sara Errani and Roberta Vinci have all met the points total required for qualification for the end of season event.
"We are excited to add Maria, Agnieszka, Sara and Roberta to the TEB BNP Paribas WTA Championships - Istanbul player field, although Maria continues to rehab from her injury," said WTA Chairman and CEO Stacey Allaster.
"We are less than a month away from the Championships and are eager to continue building towards what will be another sensational tournament for the fans in Istanbul and tennis fans around the world."
Sharapova is currently in third in the World Rankings and her qualification was helped by her titles in Indian Wells and Stuttart, as well as runner-up finishes at the French Open, Miami and Madrid. Radwanska, meanwhile, has picked up titles in Sydney, Auckland and Seoul, and reached the final in Stanford.
Errani and Vinci are currently the No. 1 ranked doubles team in the WTA. They picked up their third slam title as a duo at this year's Australian Open and won titles in Paris and Doha. The Italians were the runners-up at the 2013 French Open and also reached the final in Sydney and Rome.