Chentouf took up athletics in 2008.[2] He made his senior international debut at the 2012 Summer Paralympics in London. He entered into three events, the 800m and 5,000m at T12 classifications and the 1,500m T13 race. He reached the podium in the 5,000m, taking gold with a world record breaking time of 13:53.76.[2]
The following year he entered the IPC Athletics Marathon World Cup in London, his first competitive international marathon. He won the race in a time of 2:24:00, setting another world record in the T12 class.[3] The same year he represented Morocco at the 2013 IPC Athletics World Championships in Lyon, Chentouf won gold medals in all three of his events, the 1500m, 5000m and the marathon.[2][4]
Two years later, in the buildup to the 2016 Summer Paralympics in Rio de Janeiro, he took part in the inaugural IPC World Marathon Championships held in London. There he won the men's T11/T12 race with a time of 2:21.33.[5] Later in the year he took part in his second World Championships, this time held in Doha. He failed to dominate the field as he had done so at Lyon, but he did win the bronze in the 1500 metres (T13).[2] In Rio Chentouf cemented his reputation as one of the great distance runners in his class, by winning the men's marathon and taking the silver medal in the 5000 metres.[2]
