The Fed/Nadal match is at the top of some lists, but it didn't have the heart and soul of the great ones of the prior era. They have had some great ones over the years but they just don't have the overall "I want to kill you" mentality as other rivalries did.
Mac/Borg US Open in 80; Mac/Connors Wimbledon in 82; and Chrissy/Martina at French in 85 were all better and were just gut punches.