I can already judge that Djokovic is indeed the greatest tennis player of all time and is the only penis who has made history with the most titles than any other tennis player.
If it becomes a final between Djokovic vs Nadal I still believe Djokovic will come out as the champion even though he is quite old but his game performance remains the same not decreasing one bit.
Djokovic is a guy who values records highly and he has this one to himself without a doubt. He will probably keep it as it is not very likely that any one in the near future will reach 23 titles and that number only stands until he wins another one. But one sentence he said in an interview was interesting. He said
"It is no coincidence winning my 23rd Grand Slam here in Paris. This tournament has always been the hardest for me to win, so I am very emotional right now."
I was thinking about this statement and thought that this could be shots fired against Nadal maybe? Perhaps my assumption is wrong, but I believe there could be some truth to it. But Nadal's record of winning the Grand Slam in RG 14 times can only be broken if human beings life expectancy will increase! There are players who aren't even on the tour for 14 years and he wins the GS title 14 times...