Russia's Yuliya Efimova followed up Friday's world championship gold medal in the women's 200 metres breaststroke by setting a world record in the 50 metres version of the event in her heat on Saturday.
Yuliya Efimova of Russia set a world record in the 50 metres breaststroke and Australia's Cate Campbell left her rivals for 50 freestyle gold trailing in qualifying at the world championships in Barcelona on Saturday.
Freestyle queen Katie Ledecky made sure of her third swimming gold medal of the Rio Olympics, and fourth of her career, after anchoring the US women to victory in the 4x200 meters relay on Wednesday.
Russian Yulia Efimova, who won two Olympic silver medals this month after being cleared to compete in Rio following a doping ban, has compared swimming in the Games to being at war. Initially excluded from the event because of her doping record, the 24-year-old won a last-minute legal challenge to the Court of Arbitration for Sport (CAS) and finished second in the 100 and 200 metres breaststroke in Brazil. "I felt under pressure from the sportsmen, the fans, the press. This was awful and it was not like being at an Olympics, which usually unites people. This was not a competition, but a war - a old war," Efimova told a news conference on Wednesday.
Michael Phelps backed compatriot Lilly King's attitude toward Russian Yulia Efimova at the Olympics on Monday and said more people should follow her lead.
Russian swimming chief Vladimir Salnikov said on Tuesday the atmosphere surrounding his team at the Olympics reminded him of the Cold War, and criticised American breaststroke champion Lilly King for attacking the integrity of her Russian rival.
Russia's Yulia Efimova faces a life ban after the breaststroke specialist tested positive for meldonium, with her temporary suspension confirmed by the All-Russian Swimming Federation (ARSF) on Thursday.
Sun Yang became the first Chinese swimmer to win the Olympic men's 200 metres freestyle gold medal on Monday.
FINA has ruled that seven Russian swimmers, including breaststroke medal hopeful Yulia Efimova, are ineligible to compete in the Rio Olympics, world swimming's governing body said on Monday.
Australia will not apologise to China after Mack Horton called his rival and fellow Olympic swimming gold medallist Sun Yang a ''drug cheat'', delegation head Kitty Chiller said on Tuesday.
Weakened and bruised by sport's biggest doping scandal in decades, Russia is under siege at the Rio Games.
Chinese Olympic women's swimmer Chen Xinyi tested positive for a banned substance at the Rio Olympics on August 7, state media said on Friday citing the country's swimming association, the latest doping scandal to mar competition at the Games.
All 11 Russian boxers who qualified for the Rio Olympics have been given the all clear to compete at the Games, the International Boxing Association (AIBA) said on Thursday.
At the medal ceremony, Scott shook hands with fellow bronze medallist Martin Malyutin of Russia, who finished with the same time as the Briton, but then completely cold shouldered Sun, refusing to make eye contact and not offering a handshake.
Lithuanian teenager Ruta Meilutyte won the 100 metres breaststroke gold at the world championships in Barcelona on Tuesday, with a time just outside the world record she set in Monday's qualifying.
A summary of sports events and sports persons, who made news on Wednesday.
Two swimmers made the biggest waves in Rio, Michael Phelps racing to retirement as the greatest of all time and US team mate Ryan Lochte slipping out of the country before police could stop him.
Here is the current state of play among the 28 Olympic sports.
Sweden's Sarah Sjostrom set a world record for the women's 100 metres butterfly at the world swimming championships on Monday.
American swimmers smashed records and grabbed gold at the world championships on Friday, with sprint king Caeleb Dressel taking down Michael Phelps' 100 metres butterfly world record and teenager Regan Smith lowering the women's 200 backstroke mark.
American teenager Katie Ledecky bettered her own 1500 metres freestyle world record with a superb display during the morning heats at the world championships on Monday.
Indian shooters got off to a positive start on day one of the ongoing International Shooting Sport Federation (ISSF) Junior World Cup (Rifle/Pistol/Shotgun), clinching seven medals, including three golds, at Gabala in Azerbaijan on Sunday.
Swimming's world body FINA promised on Wednesday to investigate "as a matter of utmost urgency" new allegations of Russian doping if they could be substantiated by evidence.
Australia set a world record of 7:41.50 en route to winning the gold medal in the women's 4x200 freestyle relay at the world championships on Thursday.
Dressel had already won three individual golds and three relay titles in Budapest and Sunday's addition allowed him to match his compatriot Phelps's tally from the 2007 championships in Melbourne.
Svetlana Kolesnichenko, the new standard bearer for artistic aquatics, added another European Championships gold to her huge collection of international medals when she took the synchronised swimming solo technical title on Monday.
Olympic champion Ruta Meilutyte of Lithuania set a European and world championship record in the heats for the 100 metres breaststroke in Barcelona on Monday.
Britain's James Guy held off a host of Olympic champions to win his first world title, the men's 200m freestyle, at the world championships on Tuesday.
Poland's Magdalena Fularczyk-Kozlowska and Natalia Madaj edged past Britain's Katherine Grainger and Victoria Thornley in the final meters of the race to snatch the gold medal in the women's double sculls at the Olympic rowing regatta on Thursday. The nail-biter saw the two boats neck-and-neck for much of the race. Britain led Poland by just .64 seconds at the halfway mark and appeared poised to win.