Do you Think Nadal is a real threat to Federer?

Rafael Nadal from Spain is a very good player and defeated Roger Federer couple of times they both have met in a match but Roger Federer is able to frustrate Rafael Nadal most of the time which makes Federer best amongst the others.Rafael Nadal s the only tennis player who have the capability of defeating Federer which he has shown couple of times before.They encountered each other recently in the finals of Wimbledon recently in which the match went on to the fifth set in which Federer proved himself by winning the set and also the Wimbledon cup.Rafael Nadal played his level best but he was defeated in the finals.Their is a great rivalry between each other which can be a real threat for Roger Federer in the upcoming encounter of each others.