Roberta Vinci: Suffered a shock defeat to Nina Bratchikova
Top seed Roberta Vinci crashed out of the Whirlpool Monterrey Open after Nina Bratchikova sprung a huge upset.
The world No.106 toppled the much-fancied Italian 7-5 7-5, breaking twice in the first set and decisively late in the second.
Vinci's compatriot Sara Errani, seeded second, fared better as she secure her quarter-final place with a 6-2 6-3 win over Alize Cornet.
Eighth seed Lourdes Dominguez Lino cruised past Valeria Savinykh 6-4 6-2 while Alexandra Candantu beat Silvia Soler-Espinosa 7-6 (8-6) 6-3.
