For winning all masters tournament? Djokovic and Federer have 7/9, Federer didn't win Monte Carlo and Rome, Djokovic also Monte Carlo and Cincinnati! The biggest problem for Djokovic and Federer is Monte Carlo where Nadal is absolute champion ( 8 cons titles). We'll see in what kind of shape will be Nadal next year, it could be a great opportunity for these two. It's funny, Fed playing in 2003 Rome finals and lost vs Felix Mantilla, and another finals in 2006 when he blow CP! Djokovic played 2 finals in MC, and 4 finals in Cincy, and he would probably in future takes title there! Nadal is at 6/9, but all remaining masters are on HC, maybe he would wins Miami, played great there in the past, but played only one final in Paris! In Cincinnati Nadal never reached final! So, probably Djokovic had a best chance for completing all masters tournaments, but we'll see it, everything is possible!