With the four biggest players in the world right now winning each Grand Slam in the order of the beginning-of-year rankings, it was a rare year that wasn't dominated by any one player (not only in terms of the slams won).
If I were to give a song title to describe the entire year of the ATP, I would have to say that "Little Bit of This, Little Bit of That" by Carolyn Dawn Johnson fits the bill best.
One line in the song that is particularly appropriate for tennis is: "Well, two hearts and opposite attraction, It's just their luck." We saw this in effect many times over the course of the year, especially in the first and last slam finals, both featuring Djokovic.
But anyway, these big four have all had very different year, and in the following slides I will attempt to summarize each one's year with a song.