Gretchen Walsh won her first individual long course world title by nearly breaking her own 100m butterfly world record. Walsh clocked 54.73 seconds at the World Swimming Championships, just off her own record of 54.60 from May 3. She owns the top eight times in history.

Men’s 400m Freestyle Gold: Lukas Martens (GER) -- 3:42.35 Silver: Sam Short (AUS) -- 3:42.37 Bronze: Kim Woo-Min (KOR) -- 3:42.60 4. Victor Johnasson (SWE) -- 3:44.68 5. Zhang Zhanshuo (CHN) -- 3:44.82 6. Marco De Tullio (ITA) -- 3:44.92 7. Petar Petrov Mitsin (BUL) -- 3:45.28 8. Oliver Klemet (GER) -- 3:46.86

Janton missed semifinals for his sole individual event by 0.09 seconds, but there is a possibility that he will swim on relays later in the week.

It's been a tough go for Team USA at the World Aquatics Championships, but the team won't leave the event without a gold medal. Gretchen Walsh secured the squad's first gold Monday, winning the 100m butterfly and setting a championship-record time in the process.

The United States team at the swimming world championships in Singapore is battling a case of “acute gastroenteritis” that compromised performances on the opening day of eight days of competition in t

Summer McIntosh beat the field by nearly two seconds to take gold in the 400m freestyle at the World Aquatics Championships in Singapore.

Chinese 12-year-old prodigy Yu Zidi misses out on 200m IM bronze medal by 0.06 seconds as Summer McIntosh wins second gold in Singapore.

Katie Ledecky vs. Summer McIntosh in the 800-meter freestyle is the highlight of the first major international competition since Paris.

At just 12 years old, China’s Yu Zidi is already one of the fastest swimmers in the world – and is impressing on the global stage.

Watch live coverage of every race at the swimming worlds on CBCSports.ca and CBC Gem, with finals beginning at 7 a.m. ET each day.