He said what went in India's favour was that "nobody expected" them to win against the mighty the Netherlands and that too after back-to-back defeats in the tournament.
"Nobody expected us to win against the Netherlands today. We were the underdogs," he told reporters after the match.
India produced an inspired performance to register their first win over the Netherlands in 18 years when they stunned the World Cup and Olympic silver medallists Dutch side in the high-voltage encounter to finish third in Pool B.
It is also India's first win over the Netherlands in the Champions Trophy after 1986 in Karachi.
The other positive that came out of the match against the Netherlands was that India could able to convert their chances.
"The positive is that we scored thrice against a side which conceded just one goal against Germany coming into the match," Oltmans said.
Oltmans, however, said India will need to address a few areas, especially conceding goals quickly after scoring, before the quarterfinal duel against Belgium on Thursday.
"We need to rectify some mistakes. We need to stop conceding goals after scoring one," he said.
