After a 2-3 defeat against formidable Netherlands in their tournament opener, India kept themselves in the hunt for the knock-out stage by eking out a hard-fought 3-2 win over Canada in their next match at the Major Dhyan Chand Stadium.
But India cannot afford either a loss or a draw against Korea in their final pool match to secure their quarterfinal berth.
With two wins out of as many games, Netherlands have already qualified for the quarterfinals from Pool C.
The Manpreet Singh-led Indian outfit has some thinking to do ahead of the crucial match as less formidable Canada made it toil hard for the 3-2 win which came in the dying stages of the match, courtesy a penalty corner conversion by Gurjinder Singh.
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Against Canada, India were by far the better side on display but missed chances were the order of the day for the hosts as they ended up making life difficult for themselves.
"We really got good chances in the last matches. We created fairly good chances and would like to stick with the same in future matches," he said.
"I have full confidence that the boys will do well in the next match against Korea like they did in the last match against Canada. Statistically we did lot of right movements like circle entry and created a lot of chances in the opposite end of the field," Clark said.
"The Koreans are a good side; they have consistently performed well in the tournament. The match will be difficult but we have confidence in ourselves. Our performance has constantly improved. But we got to be more accurate in our next encounters.