Great Britain hockey coach Jason Lee criticised an "appalling performance" as his side lost 3-2 to Argentina in their third match of the Sultan Azlan Shah Cup in Malaysia.
Lee suggested such form at this summer's Olympics would leave the team well short of the medal places.
"Quite simply it was an appalling performance," he said. "If we play like that in the Olympic Games we will finish in the minor placings."
Enrique Paredes put Argentina, whose world ranking of nine is five places below GB's, ahead after just eight minutes and although East Grinstead midfielder Ashley Jackson equalised just after half-time, Paredes restored the South Americans' lead within two minutes.
Lucas Cammareri swept home Argentina's third from the middle of the circle and although Jackson's late penalty corner gave GB hope, even replacing goalkeeper James Fair with an outfield player for the remaining four minutes could not force an equaliser.
Great Britain face New Zealand, who have won all three matches, on Wednesday without the services of James Tindall as the Surbiton forward was ruled out of the remainder of the tournament after turning an ankle in yesterday's win over India.