This came about from another conversation in another thread. Basically the question is which group out of the 4 respective players has the more potential and will be the most successful in the future, so it's not just about immediacy or recency effect.
As for success that would mean GS titles and TMC/TMS titles.
I decided grouping them would be easier than labelling them.
Gasquet, Monfils, Murray, Baghdatis
Berdych, Verdasco, Djokovic, del Potro
GS records since this thread was started.
Gasquet (FRA) 37-20
Monfils (FRA) 47-21
Murray (SCO) 76-23
Baghdatis (CYP) 39-22
Berdych (CZE) 58-26
Verdasco (ESP) 62-26
Djokovic (SRB) 110-22
Del Potro (ARG) 41-18