Superb Summer McIntosh bounces back with 400m medley gold at Pan Pacs

• Canadian wins in championship-record time

• Australia hold off Ledecky and US in 4x200 relay

• US swimmers claim six golds on second night

Summer McIntosh of Canada led all the way in winning the 400m individual medley at the Pan Pacific Championships on Thursday night, bouncing back after a runner-up finish in the 200 freestyle.

Australia led all but 150 meters of the women's 4x200 freestyle relay, with the team of Inez Miller, Lani Pallister, Hannah Casey and Milla Jansen winning in 7min 42.40sec to lower the country's championship mark of 7:44.12 set at the 2018 Pan Pacs.