Victoria Azarenka believes that she is finding her best form at the right time in the US Open.
The top women's seed, who booked her place in the last eight on Sunday with a straight-sets victory over Anna Tatishvili, said that she is growing in confidence at Flushing Meadows.
She told reporters: "At the beginning of the year, I really believed in myself and had so much passion on the court and I think I've found that same belief in this tournament.
"The pressure is there as the top seed, but I'm just focusing on myself and hope to keep this form for the rest of the way."
Azarenka will play defending US Open champion Sam Stosur in the next round after she overcame the challenge of British teenager Laura Robson to progress.
