Federer–Nadal rivalry
Hard/Grass Timeline
Table:
Tournament
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017

Australian Open

N

N

N

F

Dubai

N

Indian Wells

F
N

F

Miami
N
F

N

F

Wimbledon

F
F
N

Cincinnati

N

Shanghai

F

Basel

F

ATP Finals

F
F

F
F

N

Studying the following table concerning 'Federer–Nadal rivalry' in the 'Hard/Grass Timeline' section, give a one-line statement limited to the highlighted cells and provide it inside the JSON object {"answer": "YOUR ANSWER"}.