Vesna Manasieva celebrated her 20th birthday in style by dumping second seed Anabel Medina Garrigues out of the first round of the Banka Koper Slovenia Open in Portoroz.

The Russian world number 141, playing the highest-ranked opponent of her career, battled back from a nightmare second set to triumph 6-3 1-6 7-5 and will next play Croatian wild-card Petra Martic.

Fourth seed Robert Vinci avoided the same fate as she brushed aside local wild-card Nastja Kolar 6-2 6-0, while seventh seed Vera Dushevina was also a comfortable 6-0 6-3 winner over Tathiana Garbin.

Maria Camerin and Camille Pin were among other winners, while Russian qualifier Ksenia Pervak's reward for a three-set win over Julia Goerges will be a second-round clash with world number one Dinara Safina.