On 30 June 2011, Tamgho achieved an outdoor jump of 17.91 m at the 2011 IAAF Diamond League Athletissima athletics meeting in Lausanne. That mark would remain the world leading outdoor jump for 2011 until Christian Taylor beat it by 5 cm on September 4 in the triple jump final of the 2011 World Championships in Daegu. Tamgho fractured his right ankle while warming up for the qualification round of the 2011 European Under-23 Championships that was held in Ostrava in July 2011. He was thus forced to pull out of the upcoming 2011 World Championships in Daegu and for the rest of the year he did not take part in any athletics event held after the 2011 European Under-23 Championships in Ostrava. He underwent surgery on his fractured right ankle in the second half of 2011.