Usain Bolt said that advances in spike technology that could help wipe out his world records are laughable and that the new shoes also give an unfair advantage over any athletes not wearing them.
Usain Bolt has already started his preparations for next year's Rio Games and has sent a warning to his competitors.
China's Liu Xiang surprised even herself when she swam a world record time to win the women's 50 metres backstroke at the Asian Games on Tuesday, storming home in 26.98 seconds to claim her first major title.
Caeleb Dressel and Katie Ledecky added to the United States' gold medal haul at the Tokyo Olympics on Saturday while Australia's sensational run continued with Kaylee McKeown winning the 200m backstroke for their seventh gold in the pool.
The sprinter clocked her season best timing of 23.85 seconds but was unable to make it to the semi-finals after finishing seventh in Heat 4.
Images from the World Athletics Championships in Eugene, Oregon, on Thursday, Day 7.
He had finished 13th in the last edition of the championships in Doha in 2019 with the then national record time of 8:21.37.
Kerley, hoping to be the first American winner since Justin Gatlin in 2004, ran brilliantly for second, with De Grasse finishing fast in another lifetime best.
The Olympic and world 100m champion is looking to better Tim Montgomery's season's best of 10.04 seconds.\n\n
Antonio Watson won a thrilling World Championship 400 metres gold 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.
S Dhanalakshmi, who had beaten Dutee in the final of women's 100m sprint in the Federation Cup last month, was also named in the team,
Triple Olympic and world champion Usain Bolt will get an early look at the 2011 world championships site when he runs a 100 metres at Daegu, South Korea on May 19, his manager and organisers said on Monday.
A summary of sports events and persons who made news on Saturday
Asafa Powell thinks he has pinpointed why he has so often failed to produce on the big occasion and believes that if he is at his best he will win the 100 metres at the London Olympics.
A summary of sports events and sports persons, who made news on Wednesday.
Ryan Murphy lost the second of his Rio backstroke titles to Russian Evgeny Rylov at the 2020 Olympics on Friday and the US swimmer then suggested doping had played a part in his demise as events took an acrimonious turn at the Tokyo pool.
The 20-year-old clocked 24.40s in the men's 50m backstroke event to finish 26th in the overall heats.
Shot-putter Tajinder Singh Toor on Monday qualified for the Tokyo Olympics with a new national record at the Indian Grand Prix 4 in Patiala.
Usain Bolt and Tyson Gay safely negotiated the first heats of the 100 metres on Saturday but former world record holder Asafa Powell had a real scare on the opening day of the world athletics championships.
Caster Semenya put aside the controversy over a planned rule change in athletics regarding hyperandrogenism to win the women's 1,500 metres
Olympic champion Usain Bolt sloshed his way to an impressive win, albeit in an unimpressive time, in his first major 100 metre test of the season at the rain-soaked Toronto Festival of Excellence on Thursday. Running in a driving downpour in front of an enthusiastic but drenched crowd, Bolt splashed home in 10 seconds flat, well off his world record 9.69 set at last summer's Beijing Olympics.
Le Clos, however, was only able to clinch gold in the 50m butterfly in the first final of second day's programme and faded over the last leg to finish seventh in the 200m freestyle. South Africa finished sixth in the 4x100m relay.
Images from the World Athletics Championships in Eugene, Oregon, on Monday, Day 4.
The 22-year-old Anas clocked 45.32 sec under hot and humid conditions at the Jawaharlal Nehru Stadium. He also qualified for the World Championships to be held in London in August. The entry standard for the World Championships stands at 45.50secs.
Six-times Olympic champion Usain Bolt said he felt shocked and let down by the scandal-hit IAAF, but the Jamaican sprinter was against resetting athletics world records as the sport attempts to move on from the doping crisis.
Mitchell Larkin completed a rare backstroke double and Bronte Campbell won the blue riband women's 100 metres freestyle title as Australia celebrated another golden night at the world swimming championships.
Gay won the race in 9.84 seconds, by an impressive 0.23 seconds, the largest margin of victory in a US championships 100 metres since electronic timing began in 1975.
Ariarne Titmus and Elijah Winnington led podium sweeps as Australia got the Commonwealth Games swimming competition off to an explosive start on Friday, scooping 11 medals in total including five golds
On a night when American Allyson Felix also became the most decorated track and field athlete in Olympic history and Dutchwoman Sifan Hassan's dream of an unprecedented Games treble disappeared, Uganda's Joshua Cheptegei wiped away his 10,000 metres disappointment with an impressive 5,000m win.
Katie Ledecky of the United States destroyed the field in the 800 meters freestyle on Friday and broke the world record to complete a rare Olympic swimming treble.
Dutee rued missing the World Relay Championships in Poland in May and two competitions in Kyrgyzstan and Kazakhstan this month due to travel restrictions
'I had to start from zero, so it was very, very frustrating and very consuming-- mentally and emotionally. I threw tantrums. There was a point that I really wanted to quit swimming.'
Asian Games medallist Tintu Luka ruled the track on the final day of competition at the 35th National Games, smashing an 18-year-old meet record to win the 800 metres gold before inspiring Kerala to the 4x400m title in Thiruvananthapuram on Friday.
Jamaica's Elaine Thompson-Herah made Olympic history in Tokyo Tuesday, blazing to victory in the 200 metres to complete an unprecedented women's sprinting "double-double".
'...I believe this is just the beginning for me and there is a long way to go ... many more medals to win for India.'
Rani had bettered her own national record with a throw of 63.24m during the Federation Cup in March before a performance of 62.83m in the National Inter-State Championships this week.
Images from the World Athletics Championships in Eugene, Oregon, on Tuesday, Day 5.
Desai, a former gold medallist at the Fazza Championships, led from start to finish to end the race in 24.42 seconds, ahead of Thailand's Denpoom Kotcharang (25.78 sec) and Kenneth Jenssen Heggdal of Norway (27.08 sec).
Swimmer Maana Patel registers Best Indian Time
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