“He’s just looked really motivated and he’s had a couple of quotes where he’s kind of said it would be nice to go undefeated for the year and that’s dangerous to me.”
Knowles’ comments echo those made by three-time Grand Slam winner Lindsay Davenport, who feels when the Serbian is emotional, he produces his best tennis.
“We saw him almost in tears when Serbia wasn’t able to win the Davis Cup and you saw how much it meant to him, his team-mates and country,” she said.
“[But] he goes into the off-season and what does he do – at the ATP Cup he was so fired up and ready to go. When he is emotional and it means so much to him he plays his best tennis.