Athletics, men's 4*400m Relay...no brainer, the USA are miles ahead in this game.
Athletics, women's 4*400m Relay...this might be a lot closer, but since I refuse to vote for that bunch of doping cheaters from and , the only option remaining is to pick the USA (and I do it only for Allyson Felix and Sydney McLaughlin, because if I look at the past...).
Swimming, men's 4*200m Freestyle...despite the amazing streak of American triumphs, in this case my pick is Great Britain, because their 2020 team was really amazing, a machine built at state-of-the-art and working perfectly.
Swimming, women's 4*200m Freestyle...once again, my pick is the last team winning the event, China, because it was such a huge surprise and also in this case it was a perfectly built team with a clear strategy, overcoming any possible individual weakness of their members.
that's how a 4*200m Free Relay should work all the times.
p.s. by the way, this vote would be very different if any other competition was included, because the 2022 Australian team has gone way beyond imagination in this specific event.
Diving, men's 10m Synchronized Platform...here any Chinese loss should be considered just an accident, it's impossible not to pick China.