Overall H2H weighted by Big Titles surfaces
Clay Big Titles: 4/14
HC Big Titles: 9/14
Grass Big Titles: 1/14
They had 55 matches, so we can expect:
Clay Matches: 55*4/14 = 15,71
HC Matches: 55*9/14 = 35,36
Grass Matches: 55/14 = 3,93
Clay H2H: 7-17 (I always refer at Djokovic First)
Adjusted Clay H2H: 4,58-11,12
HC H2H: 20-7
Adjusted HC H2H: 26,19-9,17
Grass H2H: 2-2
Adjusted Hard H2H: 1,96-1,96
Total Adjusted Overall H2H: 32,73-22,25
Slam H2H weighted by Slam surfaces
They had 15 matches, so we can expect:
Clay Matches: 15*1/4 = 3,75
HC Matches: 15*2/4 = 7,5
Grass Matches: 15*1/4 = 3,75
Clay H2H: 1-6
Adjusted Clay H2H: 0,54-3,21
HC H2H: 3-2
Adjusted HC H2H: 4,50-3,00
Grass H2H: 2-1
Adjusted Grass H2H: 2,50-1,25
Total Adjusted Slam H2H: 7,54-7,46
This was all for fun. But if you think current Big Titles/Slams distribution is fair, H2H are heavy skewed in favor of Rafa.
I'm not sure about this. I think Master 1000 distribution is fair(Without considering grass), but ATP Finals on HC and only 1/4 Slam on Clay make the distribution biased in favor of HC/Clay comparing it with importance on every surface in the tour nowadays.
Clay has a season of more than 2 months and a lot of tournament, both early in the year and after Wimbledon. I haven't number of tournament in the year by surface, my personal opinion of surface "importance" today is 60% HC-30% Clay-10% Grass, but I can't justify this.
Slam can be also skewed by other circumstances, when players meet(Both age and form), the exact tournament(Play Nole at USO is not as play him at AO, play Rafa at Madrid is not as play Rafa at RG).
So, this is not a great case for Nole IMO, but they are a bit skewed by surface.