Roberta Vinci "feeling confident" ahead of Agnieszka Radwanska clash

Roberta Vinci has said that she is capable of knocking Agnieszka Radwanska out of the US Open.

The Italian set up the last-16 meeting with the world number two thanks to a victory over Dominika Cibulkova yesterday evening.

Despite admitting that Radwanska is a "great player", Vinci is adamant that she is in the right frame of mind to record a positive result.

"She's a great player," said the number 20 seed. "I'll have to play very well, but I'm feeling confident right now, so we will see what happens."

The 29-year-old's run at Flushing Meadows this year has been the furthest that she has ever gone.