Gold-medal favorite Kenzo Shirai failed to live up to his billing after falling to a shock fourth-place finish in the men's floor exercise final at the Rio Olympics on Sunday.

All-around champion Kohei Uchimura was also denied his first-ever Olympic individual apparatus medal after finishing fifth behind gold medalist Max Whitlock of Britain and the Brazilian pair of Diego Hypolito and Arthur Mariano, who claimed silver and bronze, respectively.

"I wasn't nervous but I was paying too much mind to my routine," said the 19-year-old Shirai, the two-time floor world champion "Twist Prince" who was expected to add the Olympic title this week at Rio Olympic Arena.