Sérgio Geraldo de Alencar Rodrigues (14 February 1930 – 17 August 2014) was an international freestyle swimmer and water polo player from Brazil.

[1][2] At the 1948 Summer Olympics in London, he finished 8th in the 4×200-metre freestyle final, and swam the 100-metre freestyle, not reaching the finals.

[1] At the 1952 Summer Olympics in Helsinki, he participated in the water polo, finishing 13th.

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