"Let it remain as cricket and don't make us feel as if we are standing on a war front," he said.
Sri Lanka will hope to make it an all-subcontinent final when they tackle New Zealand in the first semi-final in Colombo on Tuesday.
Sri Lanka, the 1996 champions, made the last four with a 10-wicket rout of England while the Black Caps defied all expectations by defeating South Africa.
New Zealand will be playing in a sixth semi-final.
"It is important to be confident but we should be realistic.
New Zealand will be hungry for a place in the final and so are we," said Sri Lanka skipper Kumar Sangakkara.
Sri Lanka defeated New Zealand by 112 runs in the group stages in a bad-tempered affair where former captain Mahela Jayawardene refused to walk despite claims of a clean catch by Nathan McCullum.
New Zealand's mood was not helped when the decision remained not out even after a TV review.
The Kiwis have lost in the World Cup semi-finals to the West Indies (1975), England (19