The Tokyo Games have been going in reverse for the swimmers who have been chasing gold in the pool at Tokyo Aquatics Centre.
Rather than having their heats and prelims in the morning and saving the finals for primetime, the format has been switched up in Tokyo, which has forced the competitors to adjust from their usual schedule.
"I had a feeling going in a few days prior that this wasn't going to be a race for a time," American Chase Kalisz said after winning the men's 400 individual medley on Sunday. "It was gonna be a battle of who prepared the most through prelims and finals with the order mixed up. This is not something that we're used to. I've done it once in my life and it was at a grand prix meet a few months ago and it didn't necessarily go well for me."