Passage: In the 1972 Asian Cup, Cha scored a goal as South Korea reached the final before losing to Iran. He was part of the South Korean national team in the 1978 Asian Games, where the team jointly won the gold medal with North Korea due to the final ending in a scoreless draw. His last international tournament was the 1986 FIFA World Cup finals in Mexico, South Korea's first appearance since 1954. Cha had retired from international play but was persuaded to come back for the tournament. South Korea lost to Argentina and Italy but drew against Bulgaria. The opposing teams were fully aware of Cha's scoring abilities and frustrated him by putting two defenders on him at all times, and he went scoreless in the tournament. Looking back, he said, "We didn't achieve our first win but the campaign wasn't disappointing as we played hard and well against the best teams in the world, including the eventual champions Argentina." Cha retired from international football following the tournament.

Question: What was his final tournament?
1986 FIFA World Cup finals