Peaty and Sjostrom lend star power to World Championships
Britain's Adam Peaty tests positive for COVID after winning silver medal
Martinenghi relishes beating 'idol' Peaty and Fink to gold in favourite lane
Olympic Games roundup: Peaty pipped at the post as Biles dazzles
Italy's Martinenghi unseats former champion Peaty to 100m breaststroke gold
