Blatter was responding to a proposal by Dr Chung Mong-joon, president of the Korean Football Association, that was accepted “in principle” by the executive committee of the Asian Football Confederation allowing the Koreans to field a team comprising players from both sides of the border.
“If this situation arises in such a manner then we will be faced with a new problem,” said Blatter.
“But let’s wait and see.”
In October’s Asian Cup finals, South Korea have been drawn to face China, Kuwait and Indonesia. The issue will be discussed at the first summit between the leaders of both Koreas to be held since 1945, in Pyongyang from June 12 to 14.
Blatter did not rule out the involvement of North Korea in the hosting of the 2002 World Cup, which the South Koreans are due to co-host along with Japan.
“FIFA will not close the door,” said Blatter. “The door is still open.”