The national team of Cameroon for all its history was remembered for the time being with only one performance at the Cup of Confederations. "But in this case I think it was useful and very important", he said.
Although replays appeared to show Vargas in a marginally offside position, concerns will be raised over the length of time it took to make the decision and the confusion surrounding the referee's signals to viewers on television.
Eduardo Vargas completed the win for Chile with his last gasp finish three minutes into stoppage time.
Against Mexico, Portugal had to wait to find out that the score would stay at 0-0 in the first half when Nani's shot was overruled for an offside call that went unflagged in an earlier phase of play.
Vidal was the engine driving the South American team, which created but squandered numerous chances for goals shortly after the start of the match, during which time they fully dominated Cameroon's Indominable Lions.
Chile and Arsenal star Alexis Sanchez (l) may miss Sunday's match with an ankle sprain. Nevertheless, along with rivals in the group: Australia, Cameroon and Germany, the Chile team at least can count on the second line.
Cameroon could also have argued they should have had a referral in the first half when Vincent Aboubakar was harshly adjudged to have pulled back Vidal as Michael Ngadjui headed in a free-kick.
The 27-year-old was flabbergasted to see the linesman's flag raised, but video replays showed that Sanchez was onside in the build-up and Vargas' 34th worldwide goal was given.
Ondoa had to palm away a Jose Fuenzalida shot two minutes later as Chile took firm control.
In the 23rd minute, Cameroon had the ball in the net.