Aries Merritt

In the final of the 110m hurdles at the 2011 World Championships in Athletics, Merritt was initially classified 6th, with a time of 13.67 s. After Dayron Robles was disqualified, Merritt was promoted to 5th. His season's best was 13.12 s, achieved in Eugene, Oregon and Oslo.

Merritt began the 2012 campaign by altering his approach to the first hurdle, switching from eight to seven steps.[4] In an interview he stated, "[it] was pretty risky to make a change like that, but something had to be done if I was going to compete with (Liu Xiang of China and Dayron Robles of Cuba). The change allows me to maintain my momentum going into the first barrier." Merrit's change was highly successful for the 2012 indoor season as he became the indoor world champion in the 60 meters hurdles at the 2012 World Indoor Championships in Istanbul. In the final, he beat Liu Xiang and Pascal Martinot-Lagarde with a time of 7.44 s.

At the Olympic trials in Oregon, Merritt won the 110 meter hurdles final in a world leading time of 12.93 s,[5] making the Olympic team for the first time. Merritt subsequently matched the time at two consecutive Diamond League events, at Crystal Palace and Monaco, winning both races.

At the 2012 Olympic Games in London, Merritt began by running the fastest qualifying time in the heats with a time of 13.07 s. In the semi-finals, he was again dominant with a time of 12.94 s. In the final, Dayron Robles and Merritt got the fastest starts but Merritt pulled ahead at hurdle 3. He continued to a personal best of 12.92 s and a 0.12 s win over reigning world champion Jason Richardson.[6][7]

On September 7, 2012, at the final Diamond League meet (Memorial Van Damme) in Brussels, Belgium, Merritt ran a time of 12.80 s in the 110 meter hurdles, shattering the old world record of 12.87 s held by Dayron Robles. Merritt's performance was the largest drop in the world record for 110 meter hurdles (0.07 s) since Nehemiah in 1981.[8] Merrit ran consistently throughout the 2012 season. The following are his times that lead-up to his world record performance in the 110 meter hurdles:

Meet	Date	Time
2012 U.S. Olympic Trials (final)	June 30, 2012	12.93
Aviva London Grand Prix	July 13, 2012	12.93
Herculis	July 20, 2012	12.93
2012 Summer Olympics (final)	August 8, 2012	12.92
Aviva Birmingham Grand Prix	August 26, 2012	12.95
Internationales Stadionfest	September 2, 2012	12.97
Belgacom Memorial Van Damme	September 7, 2012	12.80

Merritt finished 6th at the World Championships. After the competition, he felt very ill and was diagnosed with collapsing focal segmental glomerulosclerosis, a rare congenital kidney disease,[9] aggravated by a parvovirus that had attacked his kidneys and bone marrow.[10] After several months of medical treatment, he was eventually able to return to competition on the following year, albeit far from his previous registers.[11]

Merrit's recovery from his kidney problems was enough to allow him to finish third in the USATF Outdoor Championships in June, obtaining a place for the World Championship.[12] On 28 August he won the bronze medal in the 110m hurdles, just four days before undergoing a scheduled kidney transplant.[11][13]

He won the 2017 IAAF Diamond League 110m hurdles in Rome on June 8, 2017