First choke I remember was Wimbledon 06 final second set. Chocked when serving for the set and again in the tie-break.
I'd say he kinda choked Wimbledon 07 too, Fed served better for the tie breaks, but Rafa lost the momentum in the 5th when he was clearly the better player.
Chocked Miami 09 against Delpo after working so hard to gain the momentum after losing the first and being a breakdown in the 5th.
AO 2012 obviously, such a poor game to be broken back from 30-15, after fighting so hard to gain momentum and looking like the better player for most of that 5th set.
USO 2015 might be the biggest choke.
Actually don't think AO 2017 was a choke, his level didn't drop in the 5th and actually was much better than his level in the first three sets especially
Choked a little in WIM 2018, but Novak was the player with the bigger chances in the 5th and after serving to stay in the match on 4 occasions, he eventually faltered. Think the choking lies mainly in him not winning the 3rd when he was the better of the two, rather than not converting a BP in the 5th
Choked big time against Nick in Acapulco in 2019, but all in all didn't play a poor match throughout
Massive choke against Thiem in AO 2020. Really rare for him to play a great level and lose to someone other than Novak or Fed.
Big choke again against Thiem and more notably against Med in WTF 2020. In hindsight, his best chance to win WTF
As big, if not bigger, of a choke against Tsitsipas in 2021 AO. Just fell away after not winning the third, although for some reason it always looked like he was going to struggle if he didn't win that set.
He choked against Novak in RG 2021 too, but I don't know if he could have pulled of the win and then won the final too, given the state of the foot. If he doesn't let Novak in the match in the first set to come back to 5-3, he probably dominates the opening proceedings of the 2nd. Also chocked massively in the third after coming back to 5-5.
He won some epics after choking like WIM 08, RG 13, USO 2019 and this year's AO final. Biggest choke IMO is a bit controversial, but if he could have won 2 of the 5 tie-breaks he lost to Thiem in 2020, I think he either wins AO or WTF.
Unpopular opinion: WIM 2019 was a choke. He was playing as good if not better than 2018 and had he been able to play maybe 10-20% better against Fed, I think he would have won the title. His level was the highest of the Big 3 coming into that SF. Just never got any rhythm against Fed and played without a clear game plan.