The United States set a new world record in the final event of the day at the World Para Swimming Championships ©Getty Images

The United States ended day three of the World Para Swimming Championships in Madeira by setting a new world record in the mixed 4x50 metres medley relay 20 points final.

Ellie Marks, Leanne Smith, Abbas Karimi and Rudy Garcia-Tolson combined for a time of 2min 32.49sec to take the gold medal, finishing more than 10 seconds in front of the other medallists.

Only half a second separated second to fourth, but it was Italy and Spain who took silver and bronze at the expense of Brazil.

It was a strong end to the day for the Americans, with victories also for Gia Pergolini and Robert Griswold in the women's S13 100m freestyle and men's S8 100m butterfly, respectively.

Pergolini touched the wall in 1:00.10, leading a podium completed by Japanese swimmer Ayano Tsujiuchi and Carlotta Gilli of Italy.

Griswold won his race in 1:02.43, with Alberto Amadeo of Italy and Gabriel Silva de Souza of Brazil finishing second and third.

Eight championship records were set today in finals too, the first being Gabriel dos Santos of Brazil's 1:57.69 in the men's S2 100m backstroke, leading Alberto Abarza of Chile and Jacek Czech of Poland home.

Gia Pergolini was one of three American champions in the last four races ©Getty Images
Gia Pergolini was one of three American champions in the last four races ©Getty Images

Pin Xiu Yip of Singapore set a new World Championships best of 2:15.16 in the women's S2 100m backstroke to beat Mexico's Fabiola Ramirez and Angela Procida of Italy to the gold.

Naohide Yamaguchi of Japan set a record in the men's SB14 breaststroke final of 1:04.46 as Jake Michel of Australia and Brazilian Joao Brutos de Oliveira claimed the minor medals.

Maria Gomes broke the championship record in the women's S12 50m freestyle final in 26.86sec ahead of Britain's Hannah Russell and compatriot Lucilene da Silva.

Spain's Marta Fernandez set a new best in the women's S5 50m butterfly with 41.91, finishing far in front of Turkey's Sevilay Ozturk and Joana da Silva of Brazil.

Nelson Crispin Corzo of Colombia won by more than five seconds to Juan Gutierrez of Mexico and Talisson Glock of Brazil in a time of 2:41.16 in the final of the men's SM6 200m individual medley.

Italian Simone Barlaam set a championship record two races later in the men's S9 100m butterfly in 58.29 to beat Australian William Martin and team-mate Federico Morlacchi.

Finally, Cypriot swimmer Karolina Pelendritou clocked a time of 1:21.01 to metaphorically blow her opponents out of the water in the women's SB11 100m breaststroke final.

Nadia Baez of Argentina was seven seconds back for silver and Yana Berezhna of Ukraine was 11 off the winner for bronze.