When the domestic tests reach international showdowns: American Gretchen Walsh (top), among those excelling at the Westmont round of the Pro Swim series in the U.S. this past week is snapped on her way to the World 50 'fly title in Singapore last year, with Australia's Alexandria Perkins - a hauler of titles at NSW championships over the past three days - , heading for silver two lanes along, the bronze going to Belgum's Roos Vanotterdijk in the lane between them. (Photo by Patrick B. Kraemer / MAGICPBK, all rights reserved)