Lee Young Pyo agreed with Hiddink and praised the Dutchman's immense contribution to the team.
"Our results in the World Cup have been a combination of a lot of things," said the Anyang midfielder.
"Things like the strategy and tactics of the coach and the coach knows how to get the best out of us.
"There is also the effort from the players, the support from the government and the Korean FA and not forgetting the marvellous support from the fans.
"So what we have achieved is down to the whole Korean people and not just the team.
"Our confidence has increased with each win and we are ready to play even harder against Spain."
Korea's chances of recording yet another historic win against Spain could rise if Raul is not fit to play and the Real Madrid striker appears to be losing his battle to be fit.
He trained today for the first time since injuring his groin in the second-round win over the Republic of Ireland on Sunday but he did not join in with his team-mates.
Instead he did some jogging, stretching and some light ball work on his own with his upper right leg heavily strapped.
Spanish team doctor Genaro Borras, who supervised Raul's workout, refused to rule him out completely and claimed he could make the substitutes' bench.
"One positive thing is he didn't feel any pain today, so I wouldn't rule him out," said Borras.
"Whether he plays, though, will be up to the coach."
Raul's strike partner Fernando Morientes was more downbeat.
"Knowing Raul, if he's not 100 per cent fit he won't play," he said.
"He didn't take part in the full training session today so it's hard to see him playing tomorrow but you never know."
If Raul does not start, Morientes is likely to be partnered up front by the pacy Juan Carlos Valeron.
Valeron's Deportivo La Coruna team- mate Diego Tristan is expected to start on the bench, although briefly during today's training session it was feared he might not feature at all when he hurt his ankle.
It was the recurrence of an old injury but after a quick examination Borras was confident it was "nothing serious" and that he would be available for tomorrow.
Hiddink has his own injury worries. Defender Kim Tae Young broke his nose against Italy, while midfielder Kim Nam Il twisted his ankle.
Camacho claims he has learnt from Korea's wins over Portugal and Italy and he feels it is important Spain take their chances and not waste them like the Azzurri did.
"We have to play our own game and not carry the ball too much," he said.
"We have to take the chances Italy couldn't take because Korea pinch a lot of possession and always close you down. They don't create many chances but they take them."
