New York: Four years after being on top of the women's tennis world, Serbians Ana Ivanovic and Jelena Jankovic are struggling with their confidence and mental toughness in trying to find a way back to the top.
"Well, the bottom line is this is a mental game in the end," said reigning US Open men's champion Novak Djokovic. "Everybody is practicing really hard. There's a lot of competition out there.
"Mentally they need to overcome the pressure, the issues, and start believing on the court that they can actually do it."