The thing is, if Rafa isn't going to win anymore slams, that really just leaves Djokovic and Murray. Considering the lack of competition, it's silly to think he can't. Delpo is a danger, but unless Rafa's hardcourt form goes to hell, he only has a huge worry about 2 guys.
"To paraphrase Albus Dumbedore… If you're waiting for universal popularity, you'll be on Twitter a VERY long time." - JK Rowling #TeamRafa