Synchronised Swimming - Duet Free
· Russia won all previous five editions of the women's duet free routine.
· Svetlana Kolesnichenko (RUS) won two gold medals in this event (one as a reserve).
· A victory would put Kolesnichenko on a par with Natalia Ishchenko (RUS) on three World Championships gold medals in women's duet free routine. Only Svetlana Romashina (RUS, 5 gold medals) has won more.
· On Wednesday Kolesnichenko won the solo free routine, claiming her 15th medal at the World Championships (all gold).
· Only Svetlana Romashina (22) and Natalia Ishchenko (20) now won more gold medals in synchronised swimming at the World Championships then Kolesnichenko (15).
· China finished second in duet free routine at each of the last three editions of the World Championships.
· Sisters Jiang Wenwen (CHN) and Jiang Tingting (CHN) will make their World Championships comeback. The Jiang sisters took the bronze medal in this event in 2009 and claimed the silver medal in 2011 and 2013.
· The Jiang sisters could both claim their fourth medal in this event. Only Svetlana Romashina (G5) has more.
· At the 2015 FINA World Championships, Anna Voloshyna (UKR) and Lolita Ananasova (UKR) claimed the first medal for Ukraine in this event, finishing third.
· At the 2015 FINA World Championships, Spain failed to claim a medal in the duet free routine for the first time. It claimed silver in this event in 2007 and 2009 and bronze in 2011 and 2013.
Diving - Men's 3m Springboard
· Chinese divers and divers from the United States have won the men's 3m springboard record six times. Russian (3) and Canadian (1) divers have also won the gold medal in this event.
· US divers won each of the first six editions of this event. That streak was broken by China's Yu Zhuocheng (CHN) in 1994.
· China furthermore has won the last five editions of the men's 3m springboard at the World Championships.
· Cao Yuan (CHN) and Xie Siyi (CHN) can continue China's winning streak in this event.
· Cao finished fourth in this event at the 2015 FINA World Championships in Kazan, behind He Chao (CHN), Ilya Zakharov (RUS) and Jack Laugher (GBR).
· Laugher can become the first Briton to win the men's 3m springboard at the World Championships.
· Laugher already is the only British medallist in this event, having claimed the bronze medal in 2015.
· Coming into these championships, the only Briton to have won an individual diving event at the World Championships is Thomas Daley (GBR), who won the men's 10m platform in 2009.
· Laugher won two of the four FINA Diving World Series in 2017, in Beijing and Windsor.
· Ilya Zakharov (RUS) hopes to become the third Russian to win this event, after Dmitriy Sautin (1998 and 2001) and Aleksandr Dobroskok (RUS, 2003).
· Zakharov took home the silver medal in this event in 2011 and 2015 and could become the first diver with three silver medals in this event at the World Championships.
Open Water Swimming - 5km Team Relay
· Germany is the only team to have won a medal at all three World Championships since the mixed team event is being held in its current format - 2011 (bronze), 2013 (gold), 2015 (gold).
· Isabelle Härle (GER) and Christian Reichert (GER) are the only swimmers on two world titles in this event (since current format in 2011). Härle is the only to win a medal (also bronze in 2011) to claim a medal in all three editions.
· Rob Muffels (GER) could win his second gold in this event, after winning in 2015. He is the only German team member from 2015 who returns to the mixed team in 2017.
· In 2015, Brazil and the Netherlands shared the silver medal, finishing in a dead heat for second place.
· Brazil also claimed a bronze medal in 2013 and it can now equal Germany on a record three medals in this event.
· On Wednesday, Ana Marcela Cunha (BRA) claimed the bronze medal in the women's 5km event.
· Cunha's bronze medal was her eighth medal across all open water events at the World Championships: G2-S2-B4. Only Thomas Lurz (GER, 13), Edith van Dijk (NED, 9) and Angela Maurer (GER, 8) also claimed eight or more medals in open water at the World Championships.
· The other countries to have won a medal are United States (gold 2011), Australia (silver 2011) and Greece (silver 2013).