Olympic great Michael Phelps was edged by a great white shark in a virtual race aired on Discovery on Sunday.
The world's most decorated athlete took on the ocean's most efficient predator in a television special as Discovery kicked off its 29th edition of Shark Week.
Phelps, the 23-time Olympic gold medallist, wore a specially designed suit and mono fin in South African waters.
The American did not even use his arms as he 'dolphin-kicked' his way to a time of 38.1 seconds in a 100-metre open water swim.
But it was not enough as he raced against a virtual shark side-by-side based on separate 50m time trials.
The shark swam a time of 36.1secs in the 100m race, handing Phelps a rare loss.