Mike Sams
G.O.A.T.
Here is the head-to-head:
Rafael Nadal 25-28 Novak Djokovic
2006 French Open QF: Rafael Nadal def. Novak Djokovic (6-4, 6-4 ret.)
2007 Indian Wells F: Rafael Nadal def. Novak Djokovic (6-2, 7-5)
2007 Miami QF: Novak Djokovic def. Rafael Nadal (6-3, 6-4)
2007 Rome QF: Rafael Nadal def. Novak Djokovic (6-2, 6-3)
2007 French Open SF: Rafael Nadal def. Novak Djokovic (7-5, 6-4, 6-2)
2007 Wimbledon SF: Rafael Nadal def. Novak Djokovic (3-6, 6-1, 4-1 ret.)
2007 Montreal SF: Novak Djokovic def. Rafael Nadal (7-5, 6-3)
2007 Masters Cup RR: Rafael Nadal def. Novak Djokovic (6-4, 6-4)
2008 Indian Wells SF: Novak Djokovic def. Rafael Nadal (6-3, 6-2)
2008 Hamburg SF: Rafael Nadal def. Novak Djokovic (7-5, 2-6, 6-2)
2008 French Open SF: Rafael Nadal def. Novak Djokovic (6-4, 6-2, 7-6)
2008 Queen's Club F: Rafael Nadal def. Novak Djokovic (7-6, 7-5)
2008 Cincinnati SF: Novak Djokovic def. Rafael Nadal (6-1, 7-5)
2008 Beijing Olympics SF: Rafael Nadal def. Novak Djokovic (6-4, 1-6, 6-4)
2009 Davis Cup 1R: Rafael Nadal def. Novak Djokovic (6-4, 6-4, 6-1)
2009 Monte Carlo F: Rafael Nadal def. Novak Djokovic (6-3, 2-6, 6-1)
2009 Rome F: Rafael Nadal def. Novak Djokovic (7-6, 6-2)
2009 Madrid SF: Rafael Nadal def. Novak Djokovic (3-6, 7-6, 7-6)
2009 Cincinnati SF: Novak Djokovic def. Rafael Nadal (6-1, 6-4)
2009 Paris Indoor SF: Novak Djokovic def. Rafael Nadal (6-2, 6-3)
2009 World Tour Finals RR: Novak Djokovic def. Rafael Nadal (7-6, 6-3)
2010 US Open F: Rafael Nadal def. Novak Djokovic (6-4, 5-7, 6-4, 6-2)
2010 World Tour Finals RR: Rafael Nadal def. Novak Djokovic (7-5, 6-2)
2011 Indian Wells F: Novak Djokovic def. Rafael Nadal (4-6, 6-3, 6-2)
2011 Miami F: Novak Djokovic def. Rafael Nadal (4-6, 6-3, 7-6)
2011 Madrid F: Novak Djokovic def. Rafael Nadal (7-5, 6-4)
2011 Rome F: Novak Djokovic def. Rafael Nadal (6-4, 6-4)
2011 Wimbledon F: Novak Djokovic def. Rafael Nadal (6-4, 6-1, 1-6, 6-3)
2011 US Open F: Novak Djokovic def. Rafael Nadal (6-2, 6-4, 6-7, 6-1)
2012 Australian Open F: Novak Djokovic def. Rafael Nadal (5-7, 6-4, 6-2, 6-7, 7-5)
2012 Monte Carlo F: Rafael Nadal def. Novak Djokovic (6-3, 6-1)
2012 Rome F: Rafael Nadal def. Novak Djokovic (7-5, 6-3)
2012 French Open F: Rafael Nadal def. Novak Djokovic (6-4, 6-3, 2-6, 7-5)
2013 Monte Carlo F: Novak Djokovic def. Rafael Nadal (6-2, 7-6)
2013 French Open SF: Rafael Nadal def. Novak Djokovic (6-4, 3-6, 6-1, 6-7, 9-7)
2013 Montreal SF: Rafael Nadal def. Novak Djokovic (6-4, 3-6, 7-6)
2013 US Open F: Rafael Nadal def. Novak Djokovic (6-2, 3-6, 6-4, 6-1)
2013 Beijing F: Novak Djokovic def. Rafael Nadal (6-3, 6-4)
2013 World Tour Finals F: Novak Djokovic def. Rafael Nadal (6-3, 6-4)
2014 Miami F: Novak Djokovic def. Rafael Nadal (6-3, 6-3)
2014 Rome F: Novak Djokovic def. Rafael Nadal (4-6, 6-3, 6-3)
2014 French Open F: Rafael Nadal def. Novak Djokovic (3-6, 7-5, 6-2, 6-4)
2015 Monte Carlo SF: Novak Djokovic def. Rafael Nadal (6-3, 6-3)
2015 French Open QF: Novak Djokovic def. Rafael Nadal (7-5, 6-3, 6-1)
2015 Beijing F: Novak Djokovic def. Rafael Nadal (6-2, 6-2)
2015 World Tour Finals SF: Novak Djokovic def. Rafael Nadal (6-3, 6-3)
2016 Doha F: Novak Djokovic def. Rafael Nadal (6-1, 6-2)
2016 Indian Wells SF: Novak Djokovic def. Rafael Nadal (7-6, 6-2)
2016 Rome QF: Novak Djokovic def. Rafael Nadal (7-5, 7-6)
2017 Madrid SF: Rafael Nadal def. Novak Djokovic (6-2, 6-4)
2018 Rome SF: Rafael Nadal def. Novak Djokovic (7-6, 6-3)
2018 Wimbledon SF: Novak Djokovic def. Rafael Nadal (6-4, 3-6, 7-6, 3-6, 10-8)
2019 Australian Open F: Novak Djokovic def. Rafael Nadal (6-3, 6-2, 6-3)
Hardcourt: 19-7 to Djokovic
Clay: 16-7 to Nadal
Grass: 2-2
Carpet: 0-0
In Majors: 9-6 to Nadal
Most of Nadal's wins came pre-2011.