Doha, Qatar: America s Nic Fink claimed men s 100m breaststroke gold as Britain s world record holder Adam Peaty made his return to action with a bron.
The women's breaststroke events will be among the deepest at the Doha World Championships, with Ruta Meilutyte and Kate Douglass highlighting the fields.
Dutch ace Tes Schouten dropped almost another second off her newly-minted personal best and national record en route to grabbing 200m breaststroke gold.