The United States became the first country to win 200 gold medals in swimming at the World Championships.
Russia won three gold medals on a single day (28 July 2017) for the first time in history.
Women's 100m Freestyle
Simone Manuel (USA) followed in the footsteps of Britta Steffen (GER, 2009), Jodie Henry (AUS, 2005) and Inge de Bruijn (NED, 2001) in winning the 100m freestyle world title as the reigning Olympic champion.
Manuel won the 200th gold medal for the USA in swimming at the World Championships. Australia is next with 73.
Sarah Sjöström (SWE, S1-B2) became the first woman to claim three medals in the women's 100m Freestyle.
Pernille Blume (DEN) took the second medal for Denmark in this event, after gold for Jeannette Ottesen (DEN) in 2011.
Men's 200m Backstroke
Evgeny Rylov (RUS) became the second Russian to win gold in this event after Vladimir Selkov (RUS) in 1994, and the first Russian to win multiple medals in this event. He took bronze in 2015.
Rylov's gold was only the second gold for Russia in any men's backstroke event, after Selkov's gold in 1994.
This was the sixth time the USA claimed two medals in the men's 200m backstroke in the same year - 2005, 2007, 2009, 2011, 2013 - but the first time not one of the two medals is a gold.
Women's 200m Breaststroke
Yuliya Efimova (RUS) became the third woman to win this event twice.
She also became the second woman, after Leisel Jones (AUS) on a record three medals in this event.
Efimova is the first woman to win 11 medals in individual events in a specific stroke. Katie Ledecky (USA) has won 10 individual medals in freestyle.
Bethany Galat (USA) claimed the fourth silver medal for the USA in this event, most of all countries.
Shi Jinglin (CHN) repeated her bronze medal in this event from 2015. It was China's sixth medal in this event (S2-B4) equal to GDR. Only USA (9) have more.
Men's 200m Breaststroke
Anton Chupkov (RUS) became the first Russian to win a medal in this event.
Yasuhiro Koseki (JPN, silver) and Ippei Watanabe (JPN, bronze) became the first Japanese swimmers to claim a medal in this event since Kosuke Kitajima (JPN) in 2011 (silver).
This was the first time in history Japan claimed two podium spots in a single event, in any gender.
Men's 4x200m Freestyle
Great Britain won this event two times in a row. Only USA (1978-1982 & 2005-2013) and Australia (1998-2003) have achieved back-to-back wins.
Great Britain won their fourth gold at the 2017 World Championships, all in men's events. This equals their best performance of four gold medals in men's events in 2015. They won a total of five gold medals in Kazan, adding a gold in the mixed 4x100m medley relay.
Russia claimed their fourth medal in this event and for the fourth time a silver medal, after 1994, 2009 and 2013.
The USA took bronze, their worst result in this event since the third place in 2001.