The 16-year-old continues her meteoric rise in the sport by breaking a record previously held by Ariarne Titmus and Katie Ledecky. Find out more below
Canada's swim star Summer McIntosh reveals the secret behind her success in our exclusive chat. And the two-time world champion talks about her relationship with water.
Who is Summer McIntosh? Everything we know about the Canadian teen swim star
Summer McIntosh sets world record in 400m freestyle at Canadian swimming trials
Summer McIntosh breaks another world record with win in 400m individual medley at trials - The Globe and Mail
Canadian teenager Summer McIntosh breaks women's 400m freestyle world record - Sports News
Summer McIntosh wins 400 individual medley in stunning swim - Agassiz-Harrison Observer
McIntosh breaks Titmus's 400m freestyle world record - Sports Aaj English TV
Titmus shatters world record to win 400m freestyle gold at worlds - The Korea Times
Swim star Ariarne Titmus questions big-stage credentials of rival Summer McIntosh
Canadian swimmer Summer McIntosh wins 400m freestyle silver at World Championship
Olympic swimming: Meet Summer McIntosh, the Canadian teen who could topple Australian swim star Ariarne Titmus
O'Callaghan trumps Titmus, smashes 14-year-old record
O'Callaghan trumps Titmus, smashes 14-year-old record for world title - CNA
Summer McIntosh breaks Ariarne Titmus' 400m freestyle world record
Swimming Ariarne Titmus world record video: Sam Short gold medal