I am more than millions times sure Djokovic won't win US Open as long as Federer is in the final. Did you know how Roger beat Djokovic in Aussie Open this year. Djokovic was saying he would topple Federer and Nadal but Federer taught him the lesson so badly. Djokovic was so embrassed afterwards and he didn't say anything about Roger since then. Someone may raise the question Djokovic beat Federer in Canada. Yes, Djoko did but Federer is not that concern about Master Cup. All he cares about is GrandSlams that is what matters the most for the CHAMPS. anyway. Davydenko will give more hard time to Roger than Djokovic, if anybody follows Roger's . The grainder gives hard time for Roger than big hitters.