Spot on agree with most of this. I think the main difference between them (other than the competition) was physical fitness and Djokovic being a bit better on clay (fed higher level on grass overall). US 16,17,18,19 fed either missed or had physical issues in all these slams. 1-2 winnable ones there.
Yep, Fed's muggery at the US open was super unexpected, especially after the 5-peat...
2009 - Blew a final he could have won in 3/4 sets, despite being up 5/4 30-0 in the 2nd for 2 sets to love lead, and being 2 points away + numerous bp's in the 4th from winning
2010 - Djoko saved the 2 Mp's, although credit to Djoke for his aggressive play here, Fed was streaky and probably would have gotten crushed in the final. Still, probably should have made another final.
2011 - No comment. The Return™. Could have made the final where I reckon he'd have a 50/50 shot against Nadal.
2012 - Flat and uninspired against Berdych, yet I thought he probably could have won the 1st set. Won cincy dominantly right before, probably would have favoured him against Murray at slams at that point, and Djoke was poor in the wind. Big missed chance.
2013 - Not winning anyways
2014 - Flat and streaky mixed in with some high level. Should have lost to Monfils, then Cilic blew him away with a crazy performance. Shame he couldn't bring better form to this one, the draw wasn't terrible.
2015 - 4/23 on BP's, enough said. Basically as even as a match can be, IIRC Djoke only won 2 more points than Fed the whole match
2016 - AWOL, which is a massive shame. Djoko was mediocre and had the ultimate collection of walkovers and withdrawals, unrivalled until FAA this year at Madrid. Wawa is Fed's pigeon off clay, if Fed had brought his 2015 form here he most likely takes it.
2017 - Starting off in poor form after recovering from the back injury at Montreal, starts to play his way into form and then returns to mug central. Watched part of the QF against Delpo yesterday and boy was I screaming at my screen, maybe even more than the 09 Final. 4 SP's blown in the 3rd set TB, one of them being a floater Delpo sitter short into the court that's an easy BHV into the open court. Instead, he lets it bounce at an awkward position, then misses a routine BH into the open court. UGH. Then in the 4th set with Delpo serving for the match, Fed's got a chance to break back, chip charges well with Delpo bunting it shoulder height, and FED SHANKS THE SITTER FH VOLLEY INTO THE STANDS.
2018 - Blows a bunch of SP's against milkman, although he probably would have lost the QF to Djoke anyways.
2019 - Back injury against Grigor, Madlad seemed like a good matchup for him, and he had Rafa's number on HC at the time.