can djokovic do the grand slam?

How much would a Djokovic bet to win the French rolled over into Wimbledon into the US Open pay off? If Djokovic makes no.1 could rafa take care of Fed in one half of the draw and Djokovic meet an under intense pressure Murray? Does four losses in a row, and comprehensive losses, mean Djokovic has worked out Rafas game? Federer also has lost three in a row, including the semi in Melbourne where Djokovic chased down everything and playing like he is on clay court. Its interesting to see that the breathing problems that led to him seeming like quiting in the past are gone with a apparently gluten free diet. Thoughts? Never been my favourite athlete but maybe a power shift in mens tennis...