Day 7 of the world championships in swimming was about known names dominating their events: Katie Ledecky of the United States with her fifth gold, this time in 800 meters freestyle. Florent Manaudou of France in the men’s 50 meters freestyle. Chad le Clos of South Africa in the men’s 100 meters butterfly. Emily Seebohm of Australia in the women’s 200 meters backstroke. Sarah Sjostrom of Sweden in the women’s 50 meters butterfly. The Americans got a second gold medal in the mixed 4×100 meters freestyle relay, setting a new world record with the team of Ryan Lochte, Nathan Adrian, Simone Manuel and Missy Franklin.
Men’s 50 meters freestyle: The wonderful Florent Manaudou picks up his third gold medal of the competition, winning with a time of 21.19, beating Nathan Adrian of the United States, who took silver with 21.52, and Bruno Fratus of Brazil, swimming a 21.55 for the bronze.
Men’s 100 meters butterfly: Chad le Clos of South Africa swam a powerful final 50 to pick up his first gold medal of the competitionץ He swam a 50.56, setting a new African record. Laszlo Cseh of Hungary took silver, swimming a 50.87 while Singapore’s Joseph Schooling, setting a new Asian record, took bronze with 50.96.
Women’s 800 meters freestyle: Katie Ledecky wins her fifth gold medal of the championship, single handedly anchoring the American campaign. She set a new world record with an 8:07.39, well ahead of Lauren Boyle of New Zealand, picking up silver with a new Oceania record at 8:17.65. Bronze went to Jazmin Carlin of Great Britain, swimming a 8:18.15.
Women’s 200 meters backstroke: Emily Seebohm of Australia won her second gold medal in Kazan, swimming a 2:05.81 to beat Missy Franklin of the United States in the finale, who swam 2:06.34 to take silver. Katinka Hosszu of Hungary picked up bronze, swimming a 2:06.84.
Women’s 50 meters butterfly: Sarah Sjostrom of Sweden won her second gold medal in the competition, swimming a 24.96 to set a new championship record. Jeanette Ottesen of Denmark swam a 25.34 to finish second for the second time in a butterfly sprint. Lu Ying, setting a new Asian record with 25.37, picked up her second bronze of the competition.
Mixed 4×100 meters freestyle relay: The United States, putting on a very strong team with Ryan Lochte, Nathan Adrian, Simone Manuel and a strong finish from Missy Franklin, got a gold medal with a world record of 3:23.05. Netherlands took silver in a terribly close race with 3:23.10, while Canada finally got a medal, trailing by just a little, swimming a 3:23.29.
Medal Table
| Rank | Nation | Gold | Silver | Bronze | Total |
|---|---|---|---|---|---|
| 1 |  United States |
7 | 7 | 4 | 18 |
| 2 |  Australia |
6 | 2 | 4 | 12 |
| 3 |  Great Britain |
5 | 1 | 3 | 9 |
| 4 |  China |
4 | 1 | 7 | 12 |
| 5 |  France |
3 | 1 | 0 | 4 |
| 6 |  Hungary |
2 | 1 | 4 | 7 |
| 7 |  Japan |
2 | 1 | 0 | 3 |
 Sweden |
2 | 1 | 0 | 3 | |
| 9 |  South Africa |
1 | 3 | 0 | 4 |
| 10 |  Russia* |
1 | 1 | 1 | 3 |
| 11 |  Germany |
1 | 0 | 2 | 3 |
| 12 |  Brazil |
0 | 3 | 1 | 4 |
 Italy |
0 | 3 | 1 | 4 | |
| 14 |  Netherlands |
0 | 3 | 0 | 3 |
| 15 |  Denmark |
0 | 2 | 2 | 4 |
| 16 | Netherlands |
0 | 3 | 0 | 3 |
| 17 |  New Zealand |
0 | 2 | 0 | 2 |
| 18 |  Poland |
0 | 1 | 2 | 3 |
| 19 |  Lithuania |
0 | 1 | 0 | 1 |
| 20 |  Canada |
0 | 0 | 1 | 1 |
| 21 |  Argentina |
0 | 0 | 1 | 1 |
 Jamaica |
0 | 0 | 1 | 1 | |
 Singapore |
0 | 0 | 1 | 1 | |
 Spain |
0 | 0 | 1 | 1 |