Synchronised Swimming - Team Free Routine
· Russia won all previous five editions of the team free at the World Championships.
· Aleksandra Patskevich (RUS), Alla Shishkina (RUS) and Angelika Timanina (RUS) were part of Russia's winning team a record four times.
· Spain's Ona Carbonell (ESP), Thaïs Henríquez (ESP) and Alba Cabello (ESP) have also won a record four medals, all have three silver and one bronze medal.
Diving - Women's 3m Springboard
· China has won 11 of the 16 world titles in the women's 3m springboard, including at each of the last eight FINA World Championships.
· The last non-Chinese diver that claimed the gold medal in this event was Yulia Pakhalina (RUS) in Perth in 1998.
· The last four world titles were divided among four different Chinese divers: Guo Jingjing (CHN) in 2009, Wu Minxia (CHN) in 2011, He Zi (CHN) in 2013 and Shi Tingmao (CHN) in 2015.
· For Guo, it was her fifth consecutive world title in the women's 3m springboard. She is the only diver with more than two gold medals in this event at the World Championships.
· Shi Tingmao could join Guo (2001-2009), Irina Kalinina (URS, 1975-1978) and Gao Min (CHN, 1986-1991) as the only divers with multiple world titles in this event. Guo, Kalinina and Gao all did this at consecutive world championships.
Open Water Swimming - Men's 25km
· Simone Ruffini (ITA) hopes to become the second swimmer to win multiple world titles in the men's 25km event.
· Yuri Kudinov (RUS) is the only one who has achieved this, including winning four times in a row from 2000 to 2003.
· Italy has won the men's 25km event twice, equal to Australia and United States. Only Russia (6) has won it more.
· At the last three world championships, the nine medals in total in the men's 25km have been won by nine different swimmers.
Open Water Swimming - Women's 25km
· Ana Marcela Cunha (BRA) won the women's 25km in 2011 and 2015 and could become the third woman to win three gold medals in this event, after Edith van Dijk (NED, 4).
· Angela Alexandra Maurer (GER) and Britta Kamrau-Corestein (GER) are the other two women on two gold medals in this event.
· Cunha can become the second woman to win this event at back-to-back world championships, after Van Dijk (2002-2003).