With nine wins out of 12 matches so far in the tournament, Mumbai Indians lie at the top of the tally with 18 points and still has two matches to play -- against Royal Challengers Bangalore and Kolkata Knight Riders -- before their semi-final encounter.
"We know that complacency could creep in, we are very much aware of such a situation. We have to play every match like a semi-final or a final and try to give our best," the South African said ahead of his side penultimate league match against second-placed RCB here on Saturday.
He also ruled out wholesale changes in the playing eleven and said the team will have a nice blend of youth and experience in Saturday's match.
"It would be a mixture of both experimentation and sticking to some of the tried and tested combinations. It is an ideal opportunity for a couple of guys to get their turn," said Duminy.
Duminy also said that he was disappointed to miss the first nine games of Mumbai Indians.
"It has been a great tournament and an unbelievable experience. The atmosphere out there at the ground is electric. I am disappointed that I have not played a major role this season," he said.
Duminy was of the view that there was no room for a specialist wicket-keeper in the shortest format of the game.
"I don't think there is a place for a specialist wicket-keeper in Twenty20s. Look at the Bangalore team, Robin Uthappa is keeping the wickets though he is not a regular wicket-keeper. It is just a 20-over game and you need to have a strong batting line-up," he said.