Miami Masters 2014 Draw and Difficulty rating of Big 4 and Wawrinka

Nole Likely route  [Difficulty Rating = 10]
-----------------

2nd]Jeremy Chardy /Monaco [+2]
3rd]Florian Mayer /Dodig  [+1]
4rth]Gulbis/Robredo       [+2]
QF]Murray/Tsonga          [+3]
SF]Federer/Ferrer         [+2]
F]Nadal/Del Potro/Wawrinka/Berdych

Federer likely route [Difficulty Rating = 10]
---------------------

2nd]Karlovic              [+2]
3rd]Verdasco              [+2]
4rth]Anderson/Gasquet     [+2]
QF]Dimitrov/Ferrer        [+1]
SF]Murray/Djokovic        [+3]
F]Nadal/Del Potro/Wawrinka/Berdych

Nadal's Likely route [Difficulty Rating = 6]
--------------------

2nd]Robin Haase           [+1]
3rd]Istomin               [+1]
4rth]Janowicz             [+2]
QF]Raonic/Monfils/Del Potro [+1]
SF]Wawrinka/Berdych/Cilic   [+1]
F]Federer/Nole/Murray  

Murray's Likely Route [Difficulty Rating = 12]
-----------------------
2nd]Ebden                  [+1]
3rd]Lopez                  [+2]
4rth]Tsonga                [+3]
QF]Djokovic                [+3]
SF]Federer/Ferrer          [+3]
F]Nadal/Del Potro/Wawrinka/Berdych

Wawrinka's likely route [Difficulty Rating = 16]
-----------------------
2nd]Gimeno Traver          [+1]
3rd]Cilic                  [+4]
4rth]Dolgopolov/Haas       [+3]
QF]Isner/Berdych           [+3]
SF]Nadal/Del Potro         [+4]
F]Federer/Djokovic/Murray

Nadal has the easiest route of all finally, Nole and Fed seems to have a moderate difficult route while Murray got a horror route to the finals among the big 4, outside the Big 4 the next major name is Wawrinka and he got a very horror of a draw.   

Note : 

.The Difficult rating is adjusted based on the player's rank, form, injury and the round at which they are facing.
.For instance Wawrinka facing Cilic in round 3 will get a difficult rating of +4 given how dangerous floater Cilic [form included], comparitvely Cilic will get a difficult rating of just +3 in facing Wawrink in round 3 [coz Cilic is lower ranked player and he deserves to face some top dogs at the round, facing Fed there would give him +4, Nole/Nadal would give the rating +5].