Guillermo Vilas defeated Wojtek Fibak 6-4, 6-3, 6-0 to win the April 1977 ATP Buenos Aires singles competition. Vilas was the defending champion.
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Seeds
A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated.
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References
1977 ATP Buenos Aires (April) – Singles Wikipedia(Text) CC BY-SA