Balestier will be buoyed by the fact that they beat East Bengal 2-1 on March 17, and will be going into the match with only attack in mind.
"We don't have any choice other than winning if we want to advance to the next round," Kraljevic told the official AFC website. "We have not done the calculations and will focus on attacking and getting a win. We don't have much choice left."
Balestier scored twice early on in their last meeting with East Bengal, but Kraljevic concedes that his side struggled in the second half.
"In the last match, we pressed them high in the early minutes and got two goals, but they didn't allow us to attack in the second half and it was not easy. It was a very tough match," he said.
East Bengal on the other hand have their own problems to worry about. Having only secured one point from three games thus far, leaving the Indian side at the bottom of the Group F standings.
But, head coach Eelco Schattorie is brimming with confidence ahead of the match against Balestier after his side beat Bharat FC and Pune in the I-League last week.
"We came back from Pune with six points from two matches and I am happy for the supporters and the club, but I am the happiest for the players as they do the job on the field. They worked very hard," Schattorie said.