The match saw 14 yellow cards handed out by English referee Howard Webb, two of which led to a red for Holland defender John Heitinga - easily setting a record for a final - as Holland tried to 'win ugly'.
Iniesta said: "I can't quite believe this yet. I had the opportunity to score that goal that was so important for my team, and it's incredible.
"I've made a small contribution in a very tough game, a very rough game - there were all sorts of things happening on the pitch.
"Spain deserved to win this World Cup. It's something we have to remember and enjoy, and should feel very proud of everyone in this squad.
"The manner in which it happened, we gave everything," Iniesta said. "To win the World Cup - there are no words to describe it."